use jdk 21 actions

Author: sisby-folk

.github/workflows/release.yml

@@ -23,10 +23,10 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v2
 
-      - name: Setup JDK 17
+      - name: Setup JDK 21
         uses: actions/setup-java@v1
         with:
-          java-version: 17
+          java-version: 21
 
       - name: Ensure gradlew is executable
         run: chmod +x gradlew