Füge Java-Version 25 zur CI-Strategie hinzu

Author: ChristianHoesel

.github/workflows/gradle.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: [ '17', '21' ]
+        java: [ '17', '21', '25' ]
 
     steps:
     - uses: actions/checkout@v5