Bump actions/checkout from 3 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -71,13 +71,13 @@ jobs:
         run: git -c "http.https://github.com/.extraheader=" fetch --recurse-submodules=no "https://github.com/lampepfl/dotty" && git reset --hard FETCH_HEAD || true
 
       - name: Checkout cleanup script
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Cleanup
         run: .github/workflows/cleanup.sh
 
       - name: Git Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Add SBT proxy repositories
         run: cp -vf .github/workflows/repositories /root/.sbt/ ; true
@@ -122,13 +122,13 @@ jobs:
         run: git -c "http.https://github.com/.extraheader=" fetch --recurse-submodules=no "https://github.com/lampepfl/dotty" && git reset --hard FETCH_HEAD || true
 
       - name: Checkout cleanup script
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Cleanup
         run: .github/workflows/cleanup.sh
 
       - name: Git Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Add SBT proxy repositories
         run: cp -vf .github/workflows/repositories /root/.sbt/ ; true
@@ -165,7 +165,7 @@ jobs:
         shell: cmd
 
       - name: Git Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Test
         run: sbt ";scala3-bootstrapped/compile"
@@ -207,7 +207,7 @@ jobs:
         shell: cmd
 
       - name: Git Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Test
         run: sbt ";dist/pack ;scala3-bootstrapped/compile ;scala3-bootstrapped/test"
@@ -244,13 +244,13 @@ jobs:
         run: git -c "http.https://github.com/.extraheader=" fetch --recurse-submodules=no "https://github.com/lampepfl/dotty" && git reset --hard FETCH_HEAD || true
 
       - name: Checkout cleanup script
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Cleanup
         run: .github/workflows/cleanup.sh
 
       - name: Git Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Add SBT proxy repositories
         run: cp -vf .github/workflows/repositories /root/.sbt/ ; true
@@ -292,13 +292,13 @@ jobs:
         run: git -c "http.https://github.com/.extraheader=" fetch --recurse-submodules=no "https://github.com/lampepfl/dotty" && git reset --hard FETCH_HEAD || true
 
       - name: Checkout cleanup script
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Cleanup
         run: .github/workflows/cleanup.sh
 
       - name: Git Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Add SBT proxy repositories
         run: cp -vf .github/workflows/repositories /root/.sbt/ ; true
@@ -341,13 +341,13 @@ jobs:
         run: git -c "http.https://github.com/.extraheader=" fetch --recurse-submodules=no "https://github.com/lampepfl/dotty" && git reset --hard FETCH_HEAD || true
 
       - name: Checkout cleanup script
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Cleanup
         run: .github/workflows/cleanup.sh
 
       - name: Git Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Add SBT proxy repositories
         run: cp -vf .github/workflows/repositories /root/.sbt/ ; true
@@ -390,13 +390,13 @@ jobs:
         run: git -c "http.https://github.com/.extraheader=" fetch --recurse-submodules=no "https://github.com/lampepfl/dotty" && git reset --hard FETCH_HEAD || true
 
       - name: Checkout cleanup script
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Cleanup
         run: .github/workflows/cleanup.sh
 
       - name: Git Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Add SBT proxy repositories
         run: cp -vf .github/workflows/repositories /root/.sbt/ ; true
@@ -437,13 +437,13 @@ jobs:
         run: git -c "http.https://github.com/.extraheader=" fetch --recurse-submodules=no "https://github.com/lampepfl/dotty" && git reset --hard FETCH_HEAD || true
 
       - name: Checkout cleanup script
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Cleanup
         run: .github/workflows/cleanup.sh
 
       - name: Git Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Add SBT proxy repositories
         run: cp -vf .github/workflows/repositories /root/.sbt/ ; true
@@ -484,13 +484,13 @@ jobs:
         run: git -c "http.https://github.com/.extraheader=" fetch --recurse-submodules=no "https://github.com/lampepfl/dotty" && git reset --hard FETCH_HEAD || true
 
       - name: Checkout cleanup script
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Cleanup
         run: .github/workflows/cleanup.sh
 
       - name: Git Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Add SBT proxy repositories
         run: cp -vf .github/workflows/repositories /root/.sbt/ ; true
@@ -528,13 +528,13 @@ jobs:
         run: git -c "http.https://github.com/.extraheader=" fetch --recurse-submodules=no "https://github.com/lampepfl/dotty" && git reset --hard FETCH_HEAD || true
 
       - name: Checkout cleanup script
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Cleanup
         run: .github/workflows/cleanup.sh
 
       - name: Git Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Add SBT proxy repositories
         run: cp -vf .github/workflows/repositories /root/.sbt/ ; true
@@ -582,13 +582,13 @@ jobs:
         run: git -c "http.https://github.com/.extraheader=" fetch --recurse-submodules=no "https://github.com/lampepfl/dotty" && git reset --hard FETCH_HEAD || true
 
       - name: Checkout cleanup script
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Cleanup
         run: .github/workflows/cleanup.sh
 
       - name: Git Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Add SBT proxy repositories
         run: cp -vf .github/workflows/repositories /root/.sbt/ ; true
@@ -632,13 +632,13 @@ jobs:
         run: git -c "http.https://github.com/.extraheader=" fetch --recurse-submodules=no "https://github.com/lampepfl/dotty" && git reset --hard FETCH_HEAD || true
 
       - name: Checkout cleanup script
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Cleanup
         run: .github/workflows/cleanup.sh
 
       - name: Git Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Add SBT proxy repositories
         run: cp -vf .github/workflows/repositories /root/.sbt/ ; true
@@ -705,7 +705,7 @@ jobs:
     if: "failure() && github.event_name == 'schedule'"
     steps:
       - name: Checkout issue template
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Open an issue
         uses: JasonEtco/create-an-issue@v2

.github/workflows/cla.yml

@@ -15,7 +15,7 @@ jobs:
   check:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - run: ./project/scripts/check-cla.sh
       if: github.event_name == 'pull_request'
       env:

.github/workflows/dependency-graph.yml

@@ -8,5 +8,5 @@ jobs:
     name: Update Dependency Graph
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: scalacenter/sbt-dependency-submission@v2

.github/workflows/language-reference.yaml

@@ -24,7 +24,7 @@ jobs:
         run: echo "date=$(date +'%Y-%m-%d')" >> $GITHUB_OUTPUT
 
       - name: Git Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: 'dotty'
           fetch-depth: 0
@@ -46,7 +46,7 @@ jobs:
 
       - name: Push changes to scala3-reference-docs
         if: github.event_name == 'push'
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: lampepfl/scala3-reference-docs
           fetch-depth: 0
@@ -74,7 +74,7 @@ jobs:
     runs-on: ubuntu-latest
     if: github.event_name == 'push' || github.event_name == 'workflow_dispatch'
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: repo-sync/pull-request@v2
         with:
           destination_branch: main

.github/workflows/lts-backport.yaml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - uses: coursier/cache-action@v6

.github/workflows/releases.yml

@@ -24,7 +24,7 @@ jobs:
         run: .github/workflows/cleanup.sh
 
       - name: Git Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Publish to SDKMAN
         run: .github/workflows/scripts/publish-sdkman.sh

.github/workflows/scaladoc.yaml

@@ -27,7 +27,7 @@ jobs:
 
     steps:
       - name: Git Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up JDK 17
         uses: actions/setup-java@v3
@@ -75,7 +75,7 @@ jobs:
 
     steps:
       - name: Git Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up JDK 17
         uses: actions/setup-java@v3

.github/workflows/spec.yml

@@ -21,7 +21,7 @@ jobs:
         working-directory: ./docs/_spec
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       # Keep in sync with ./docs/_spec/Dockerfile
       - uses: ruby/setup-ruby@v1