Update actions/cache action to v5

Author: renovate[bot]

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
       - name: Validate Gradle wrapper
         uses: gradle/wrapper-validation-action@f9c9c575b8b21b6485636a91ffecd10e558c62f6
       - name: Cache Gradle packages
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             ~/.gradle/caches