⬆️ 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

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v5
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@v6
     - uses: actions/cache@v4
       with:
         path: ~/.cache/pre-commit
@@ -23,7 +23,7 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - uses: pandoc/actions/setup@v1
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@v6
       with:
         # Keep in sync with .readthedocs.yaml
         python-version-file: .python-version

.github/workflows/pages.yml

@@ -35,7 +35,7 @@ jobs:
       - name: Setup pandoc
         uses: pandoc/actions/setup@v1
       - name: Setup python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version-file: .python-version
           architecture: x64