Update badge_or_last_milestone.yml

Limit invoice comment to deliveries

.github/workflows/badge_or_last_milestone.yml

@@ -118,6 +118,7 @@ jobs:
     if: always()
     steps:
       - name: Request invoice
+        if: github.event.pull_request.merged == true && needs.get-delivery-files.outputs.filenames != '[]'
         uses: thollander/[email protected]
         with:
           message: >