Use SAPMachine 21

Author: mofterdinger

.github/workflows/maven.yml

@@ -24,8 +24,8 @@ jobs:
     - name: Set up JDK
       uses: actions/setup-java@v4
       with:
-        java-version: 17
-        distribution: 'sapmachine'
+        java-version: 21
+        distribution: sapmachine
 
     - name: Build with Maven
       run: mvn -ntp -B clean install