chore: allow trigger security scan

.github/workflows/scan.yml

@@ -3,6 +3,7 @@ name: "Security Scan"
 # Run workflow each time code is pushed to your repository and on a schedule.
 # The scheduled workflow runs every at 00:00 on Sunday UTC time.
 on:
+  workflow_dispatch:
   push:
     branches:    
       - main