Issue comment trigger

.github/workflows/update-pis.yml

@@ -1,15 +1,12 @@
 name: Update raspberry pis
 
 on:
-  pull_request:
+  issue_comment:
-    branches:
-      - main
-    types: [closed]
 
 jobs:
   deploy:
     name: Deploy Ansible Playbook
-    if: github.event.pull_request.merged == true
+    if:  ${{ github.event.comment.body == '!run update-pis'}}
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository