Use SapMachine 25 in github action

Author: mofterdinger

.github/workflows/maven.yml

@@ -24,7 +24,7 @@ jobs:
     - name: Set up JDK
       uses: actions/setup-java@v5
       with:
-        java-version: 21
+        java-version: 25
         distribution: 'sapmachine'
     - name: Build with Maven
       run: mvn -ntp -B clean install