chore: update code formatter action (#2178)

close #2178

.github/workflows/checkstyle.yml

@@ -1,12 +1,17 @@
 name: Code Formatter
 
-on: [push, pull_request]
+on:
+  push:
+    branches: [master, Development]
+    paths:
+      - "**.java"
+    
 jobs:
   format:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@master
-      - uses: actions/setup-python@v2
+
       - name: Set up JDK 12
         uses: actions/setup-java@v1
         with: