优化workflow

.github/workflows/auto-generate-pac.yml

@@ -27,10 +27,12 @@ jobs:
 
       - name: Commit and push changes
         run: |
+          last_commit_message=$(git log -1 --pretty=%B)
+          $GITHUB_EVENT_NAME == 'schedule' && commit_message="定期更新数据并生成 gfw.pac" || commit_message="自动生成 gfw.pac: $last_commit_message"
           git config --local user.email "action@github.com"
           git config --local user.name "GitHub Action"
           git add -A
-          git commit -a -m "自动生成 gfw.pac"
+          git commit -a -m "${commit_message}"
           git push
 
       - name: Trigger Auto-Release