Bump actions/cache from 2.1.7 to 4.2.1

Bumps [actions/cache](https://github.com/actions/cache) from 2.1.7 to 4.2.1.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v2.1.7...v4.2.1)

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

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

Author: dependabot[bot]

.github/workflows/maven.yml

@@ -31,7 +31,7 @@ jobs:
 #            experimental: true        
     steps:
     - uses: actions/checkout@v3
-    - uses: actions/cache@v2.1.7
+    - uses: actions/cache@v4.2.1
       with:
         path: ~/.m2/repository
         key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}