dependency: Update actions/cache action to v5 (#68)

Author: renovate[bot]

.github/workflows/gradle.yml

@@ -23,7 +23,7 @@ jobs:
           distribution: adopt
           java-version: '${{ matrix.java }}'
       - name: Cache Gradle
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.gradle/caches
           key: >-