used JDK 11 for formatter

Author: Divyansh-db

.github/workflows/push.yml

@@ -10,10 +10,10 @@ jobs:
   fmt:
     runs-on: ubuntu-latest
     steps:
-      - name: Set up JDK 8
+      - name: Set up JDK 11
         uses: actions/setup-java@v1
         with:
-          java-version: 8
+          java-version: 11
 
       - name: Checkout
         uses: actions/checkout@v2