Update maven.yml

.github/workflows/maven.yml

@@ -9,7 +9,7 @@ jobs:
 
     steps:
     - uses: actions/checkout@v1
-    - name: Set up JDK 1.8
+    - name: Set up JDK 1.7
       uses: actions/setup-java@v1
       with:
         java-version: 1.8