[Renovate] Update actions/cache action to v4.2.1 (#79)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/gradle.yml

@@ -23,7 +23,7 @@ jobs:
           distribution: adopt
           java-version: '${{ matrix.java }}'
       - name: Cache Gradle
-        uses: actions/[email protected].0
+        uses: actions/[email protected].1
         with:
           path: ~/.gradle/caches
           key: >-