Update submit_scheme_via_issue.yaml

allow for labeling to trigger workflow as well

Author: trappitsch

.github/workflows/submit_scheme_via_issue.yaml

@@ -1,7 +1,7 @@
 name: Submit a new scheme via a GitHub issue
 on:
   issues:
-    types: [opened, edited]
+    types: [opened, edited, labeled]
 
 jobs:
   add-to-database:
@@ -39,4 +39,4 @@ jobs:
           - Closes #${{ github.event.issue.number }}
         branch: add_scheme_issue_${{ github.event.issue.number }}
         labels: scheme_submission
-        draft: false
+        draft: false