Bump actions/checkout from 4 to 5

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 5.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/CI.yml

@@ -21,7 +21,7 @@ jobs:
     runs-on: ${{ matrix.runner-os }}
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
 
     - name: Initialize CodeQL
       if: matrix.runner-os == 'ubuntu-latest'
@@ -98,7 +98,7 @@ jobs:
         target-os: [windows-latest, ubuntu-latest, macos-latest]
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
 
     - name: Setup .NET
       uses: actions/setup-dotnet@v2
@@ -155,7 +155,7 @@ jobs:
     runs-on: ${{ matrix.runner-os }}
     concurrency: integration-test-${{ matrix.source-vcs }}-${{ matrix.runner-os }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
 
     - name: Setup .NET
       uses: actions/setup-dotnet@v2
@@ -286,7 +286,7 @@ jobs:
     environment: PUBLISH_RELEASE
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
       with:
         token: ${{ secrets.RELEASE_NOTES_PAT }}
         fetch-depth: 0

.github/workflows/copilot-setup-steps.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Setup .NET
         uses: actions/setup-dotnet@v2

.github/workflows/integration-tests.yml

@@ -23,7 +23,7 @@ jobs:
         target-os: [windows-latest, ubuntu-latest, macos-latest]
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
       with:
         ref: 'refs/pull/${{ github.event.inputs.pr_number }}/merge'
         fetch-depth: 0
@@ -95,7 +95,7 @@ jobs:
     runs-on: ${{ matrix.runner-os }}
     concurrency: integration-test-${{ matrix.source-vcs }}-${{ matrix.runner-os }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
       with:
         ref: 'refs/pull/${{ github.event.inputs.pr_number }}/merge'
         fetch-depth: 0