Update gradle.yml

Author: CosmicPaul69

.github/workflows/gradle.yml

@@ -23,10 +23,10 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Set up JDK 17
-      uses: actions/setup-java@v4
-      with:
-        java-version: '17'
-        distribution: 'temurin'
+       uses: actions/setup-java@v3
+  with:
+    java-version: '21'
+    distribution: 'temurin'
 
     # Configure Gradle for optimal use in GitHub Actions, including caching of downloaded dependencies.
     # See: https://github.com/gradle/actions/blob/main/setup-gradle/README.md