Bump actions/cache from 3 to 4 (#148)

Bumps [actions/cache](https://github.com/actions/cache) from 3 to 4.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v3...v4)

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

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

.github/workflows/tests.yml

@@ -21,13 +21,13 @@ jobs:
                     java-version: '21'
                     cache: 'gradle'
             -   name: Cache SonarCloud packages
-                uses: actions/cache@v3
+                uses: actions/cache@v4
                 with:
                     path: ~/.sonar/cache
                     key: ${{ runner.os }}-sonar
                     restore-keys: ${{ runner.os }}-sonar
             -   name: Cache Gradle packages
-                uses: actions/cache@v3
+                uses: actions/cache@v4
                 with:
                     path: |
                         ~/.gradle/caches