ci: Bump actions/setup-python from 4 to 5

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] <[email protected]>

.github/workflows/python-unit-test.yml

@@ -50,7 +50,7 @@ jobs:
 
  - name: Set up Python 3
  if: ${{ matrix.pyver_os.ver != '2.7' }}
- uses: actions/setup-python@v4
+ uses: actions/setup-python@v5
  with:
  python-version: ${{ matrix.pyver_os.ver }}