Bump actions/setup-python from 3 to 5

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 3 to 5.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v3...v5)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/checks.yml

@@ -26,7 +26,7 @@ jobs:
           check-latest: true
       # pre-commit runs "pip install" which doesn't work under Debian's apt-instaled Python.
       # https://packaging.python.org/en/latest/specifications/externally-managed-environments/#externally-managed-environments
-      - uses: actions/setup-python@v3
+      - uses: actions/setup-python@v5
       - uses: pre-commit/[email protected]
         with:
           extra_args: --all-files --hook-stage=manual