fix: listen pull_request edited event so pr-title validates on title change

The pull_request event does not include the 'edited' type by default,
so changing the PR title never re-triggers the workflow. Adding
'edited' ensures the pr-title check runs immediately when the title
is updated, giving the contributor instant feedback.

Author: shenxianpeng

.github/workflows/commit-check.yml

@@ -3,6 +3,7 @@ name: Commit Check
 on:
   pull_request:
     branches: 'main'
+    types: [opened, synchronize, reopened, edited]
   workflow_dispatch:
 
 jobs: