use java 17 in action

Author: fabapp2

.github/workflows/mvn-build.yml

@@ -11,10 +11,10 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
-      - name: Set up JDK 11
+      - name: Set up JDK 17
         uses: actions/setup-java@v2
         with:
-          java-version: '11'
+          java-version: '17'
           distribution: 'adopt'
           cache: 'maven'
       - name: Build with Maven