github/workflows: Bump actions/setup-python from 5 to 6.

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 5 to 6.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v5...v6)

---
updated-dependencies:
- dependency-name: actions/setup-python
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/code_formatting.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
     - uses: actions/checkout@v5
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@v6
     - name: Install packages
       run: source tools/ci.sh && ci_c_code_formatting_setup
     - name: Run code formatting

.github/workflows/commit_formatting.yml

@@ -13,6 +13,6 @@ jobs:
     - uses: actions/checkout@v5
       with:
         fetch-depth: 100
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@v6
     - name: Check commit message formatting
       run: source tools/ci.sh && ci_commit_formatting_run

.github/workflows/docs.yml

@@ -18,7 +18,7 @@ jobs:
 
     steps:
     - uses: actions/checkout@v5
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@v6
     - name: Install Python packages
       run: pip install -r docs/requirements.txt
     - name: Build unix port

.github/workflows/mpremote.yml

@@ -16,7 +16,7 @@ jobs:
         # Setting this to zero means fetch all history and tags,
         # which hatch-vcs can use to discover the version tag.
         fetch-depth: 0
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@v6
     - name: Install build tools
       run: pip install build
     - name: Build mpremote wheel

.github/workflows/ports_unix.yml

@@ -71,7 +71,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v5
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@v6
       # Python 3.12 is the default for ubuntu-24.04, but that has compatibility issues with settrace tests.
       # Can remove this step when ubuntu-latest uses a more recent Python 3.x as the default.
       with:
@@ -204,7 +204,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v5
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@v6
       # Python 3.12 is the default for ubuntu-24.04, but that has compatibility issues with settrace tests.
       # Can remove this step when ubuntu-latest uses a more recent Python 3.x as the default.
       with:
@@ -221,7 +221,7 @@ jobs:
     runs-on: macos-latest
     steps:
     - uses: actions/checkout@v5
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@v6
       with:
         python-version: '3.8'
     - name: Build
@@ -281,7 +281,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v5
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@v6
       # Python 3.12 is the default for ubuntu-24.04, but that has compatibility issues with settrace tests.
       # Can remove this step when ubuntu-latest uses a more recent Python 3.x as the default.
       with:
@@ -306,7 +306,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v5
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@v6
       # Python 3.12 is the default for ubuntu-24.04, but that has compatibility issues with settrace tests.
       # Can remove this step when ubuntu-latest uses a more recent Python 3.x as the default.
       with:

.github/workflows/ports_windows.yml

@@ -109,7 +109,7 @@ jobs:
       run:
         shell: msys2 {0}
     steps:
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@v6
       # note: can go back to installing mingw-w64-${{ matrix.env }}-python after
       # MSYS2 updates to Python >3.12 (due to settrace compatibility issue)
       with: