ci: bump actions/cache from 4.1.2 to 4.2.0

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] <support@github.com>

Author: dependabot[bot]

.github/workflows/tests.yml

@@ -51,7 +51,7 @@ jobs:
             fh.write(f"result={result}\n")
 
       - name: Restore pre-commit cache
-        uses: actions/cache@v4.1.2
+        uses: actions/cache@v4.2.0
         if: matrix.session == 'pre-commit'
         with:
           path: ~/.cache/pre-commit