Bump actions/cache from 4.1.2 to 4.2.0 (#137)

Bumps [actions/cache](https://github.com/actions/cache) from 4.1.2 to 4.2.0.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v4.1.2...v4.2.0)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.github/workflows/ci.yaml

@@ -34,7 +34,7 @@ jobs:
       with:
         python-version: ${{ matrix.py_version }}
     - name: Cache packages
-      uses: actions/cache@v4.1.2
+      uses: actions/cache@v4.2.0
       with:
         path: ~/.cache/pip
         key: ${{ runner.os }}-py-${{ matrix.py_version }}-${{ hashFiles('requirements.txt') }}-${{ hashFiles('setup.py') }}