ci: update pr format rule

Author: sonus21

.github/workflows/pr-format.yaml

@@ -7,20 +7,25 @@ on:
       - synchronize
       - reopened
       - ready_for_review
+  push:
+    branches:
+      - master
+    paths:
+      - "**/*.java"
 
 permissions:
   contents: write
 
 jobs:
   format:
-    if: github.event.pull_request.head.repo.full_name == github.repository
+    if: github.event_name == 'push' || github.event.pull_request.head.repo.full_name == github.repository
     runs-on: ubuntu-latest
 
     steps:
-      - name: Checkout PR branch
+      - name: Checkout branch
         uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.pull_request.head.ref }}
+          ref: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.ref || github.ref_name }}
           fetch-depth: 0
 
       - name: Set up Java 21