build(deps): 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/tests.yml

@@ -69,7 +69,7 @@ jobs:
 
  - name: Install tox
  run: pip install "tox < 4"
- - uses: actions/setup-python@v5
+ - uses: actions/setup-python@v6
  with:
  python-version: ${{ matrix.python }}
  allow-prereleases: true