chore(deps): update actions/cache action to v4

.github/workflows/gradle.yml

@@ -10,13 +10,13 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Cache Gradle packages
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ~/.gradle/caches
           key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle') }}
           restore-keys: ${{ runner.os }}-gradle
       - name: Cache Node packages
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: node_modules
           key: ${{ runner.os }}-node-${{ hashFiles('**/package.json') }}