Bump actions/setup-python from 4 to 7

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 4 to 7.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](https://github.com/actions/setup-python/compare/v4...v7)

---
updated-dependencies:
- dependency-name: actions/setup-python
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/python-ci.yml

@@ -39,7 +39,7 @@ jobs:
       HYPOTHESIS_SEED: 123456
     steps:
       - uses: actions/checkout@v3
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v7
         with:
           python-version: ${{ matrix.python-version }}
       - name: Install build tools (Linux/macOS)