chore(github-actions): allow stale action to be run on demand

.github/workflows/close.yml

@@ -2,6 +2,7 @@ name: 'Close stale issues and PRs'
 on:
   schedule:
     - cron: '30 1 * * *'
+  workflow_dispatch: 
 permissions:
   issues: write
   pull-requests: write