Update workflow to trigger on main branch and use Boshen's git config

Co-authored-by: Boshen <1430279+Boshen@users.noreply.github.com>

Author: Copilot

.github/workflows/update-rolldown-stats.yml

@@ -1,14 +1,13 @@
 name: Update Rolldown Stats
 
 on:
-  pull_request:
-    types: [opened, synchronize]
+  push:
+    branches: [main]
     paths:
       - 'apps/dashboard/**'
 
 permissions:
   contents: write
-  pull-requests: read
 
 jobs:
   update-stats:
@@ -19,7 +18,6 @@ jobs:
         uses: actions/checkout@v5
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
-          ref: ${{ github.head_ref }}
           fetch-depth: 0
 
       - name: Setup Node.js LTS
@@ -67,11 +65,11 @@ jobs:
       - name: Commit and push changes
         if: steps.git-check.outputs.changes == 'true'
         run: |
-          git config --local user.email "action@github.com"
-          git config --local user.name "GitHub Action"
+          git config --local user.email "boshen@gmail.com"
+          git config --local user.name "Boshen"
           git add rolldown-version-stats.json
           git commit -m "chore: update rolldown version stats"
-          git push origin HEAD:${{ github.head_ref }}
+          git push origin main
 
       - name: No changes to commit
         if: steps.git-check.outputs.changes != 'true'