Update GitHub Actions

.github/workflows/gradle.yml

@@ -8,30 +8,22 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
-
-      - name: Gradle Cache
-        id: cache-gradle
-        uses: actions/cache@v3
-        with:
-          path: .gradle
-          key: ${{ runner.os }}-gradle
+      - uses: actions/checkout@v4.1.6
 
       - name: Set up JDK 8
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4.2.1
         with:
           distribution: temurin
           java-version: 8
-          cache: gradle
 
       - name: Give permissions to Gradle
         run: chmod +x ./gradlew
 
       - name: Build with Gradle
-        run: ./gradlew build
+        run: ./gradlew jar
 
       - name: Upload a Build Artifact
-        uses: actions/upload-artifact@v3.1.2
+        uses: actions/upload-artifact@v4.3.3
         with:
           name: PerWorldPlugins
           path: build/libs/**.jar