fix(build): Minecraft 1.21 requires Java 21

Signed-off-by: MSDNicrosoft <wang3311835119@hotmail.com>

Author: MSDNicrosoft

.github/workflows/Build.yml

@@ -27,7 +27,7 @@ jobs:
         uses: actions/setup-java@v4
         with:
           distribution: 'adopt'
-          java-version: 17
+          java-version: 21
 
       - name: Setup Gradle
         uses: gradle/actions/setup-gradle@v3