fix: resolve YAML syntax error in auto-fix.yml workflow

Author: kikoso

.github/workflows/auto-fix.yml

@@ -31,7 +31,7 @@ on:
 
 jobs:
   auto-fix:
-    if: github.event.label.name == 'agent: create-pr' || github.event_name == 'workflow_dispatch'
+    if: "${{ github.event.label.name == 'agent: create-pr' || github.event_name == 'workflow_dispatch' }}"
     runs-on: ubuntu-latest
     permissions:
       contents: write