Update actions

Author: jpenilla

.github/workflows/gradle.yml

@@ -12,20 +12,13 @@ jobs:
     if: ${{ github.event_name != 'pull_request' || github.repository != github.event.pull_request.head.repo.full_name }}
     runs-on: "ubuntu-latest"
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/cache@v2
-        with:
-          path: |
-            ~/.gradle/wrapper
-            ~/.gradle/caches
-          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*') }}
-          restore-keys: ${{ runner.os }}-gradle-
-      - uses: gradle/wrapper-validation-action@v1
+      - uses: actions/checkout@v5
       - name: Set up JDK
-        uses: actions/setup-java@v2
+        uses: actions/setup-java@v4
         with:
-          distribution: 'adopt'
-          java-version: 16
+          distribution: 'temurin'
+          java-version: 21
+      - uses: gradle/actions/setup-gradle@v4
       - name: Build
         run: ./gradlew build
       - name: Determine status