Add GitHub Action dependency caching

Author: fabapp2

.github/workflows/mvn-build.yml

@@ -11,6 +11,11 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
+      - uses: actions/setup-java@v3
+          with:
+            distribution: 'sbm'
+            java-version: '11'
+            cache: 'maven'
       - name: Set up JDK 11
         uses: actions/setup-java@v2
         with: