gha: bump actions/setup-python from 5 to 6 (#185)

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] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -49,7 +49,7 @@ jobs:
       uses: actions/checkout@v5
 
     - name: Set up Python 3
-      uses: actions/setup-python@v5.6.0
+      uses: actions/setup-python@v6
       with:
         python-version: '3.12'
         cache: 'pip'
@@ -121,7 +121,7 @@ jobs:
           path: cpython/Doc/locales
 
       - name: Set up Python 3
-        uses: actions/setup-python@v5.6.0
+        uses: actions/setup-python@v6
         with:
           python-version: '3.12'
           cache: 'pip'

.github/workflows/lint.yml

@@ -18,7 +18,7 @@ jobs:
       - uses: actions/checkout@v5
         with:
           persist-credentials: false
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: "3.x"
       - uses: tox-dev/action-pre-commit-uv@v1

.github/workflows/updpyver.yml

@@ -33,7 +33,7 @@ jobs:
           fetch-depth: 0
 
       - name: Set up Python 3
-        uses: actions/setup-python@v5.6.0
+        uses: actions/setup-python@v6
         with:
           python-version: '3'
           cache: 'pip'