Merge pull request #5 from jonashackt/renovate/actions-setup-java-2.x

Update actions/setup-java action to v2

Author: jonashackt

.github/workflows/maven.yml

@@ -10,8 +10,9 @@ jobs:
     - uses: actions/checkout@v2
 
     - name: Set up JDK 15
-      uses: actions/setup-java@v1
+      uses: actions/setup-java@v2
       with:
+        distribution: 'adopt'
         java-version: 15
 
     - name: Build with Maven