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/ci.yml

@@ -268,7 +268,7 @@ jobs:
           echo "::add-matcher::.github/local-problem-matchers.json"
       - name: Set up ${{ matrix.python.name }}
         if: ${{ job.container == '' }}
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           # This allows the matrix to specify just the major.minor version while still
           # expanding it to get the latest patch version including alpha releases.
@@ -324,7 +324,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.python.dotted }}
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python.dotted }}
           architecture: x64