Bump actions/setup-python from 4 to 5 (#182)

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 4 to 5.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v4...v5)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/release.yml

@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: Switch to using Python 3.9 by default
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: 3.9
 

.github/workflows/tox.yml

@@ -68,7 +68,7 @@ jobs:
 
       - name: Set up Python ${{ matrix.python_version || '3.9' }}
         if: "!contains(matrix.shell, 'wsl')"
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           cache: pip
           python-version: ${{ matrix.python_version || '3.9' }}