GitHub action cleanup (#662)

Author: Gordon Shotwell

.github/workflows/create-issue.yaml

@@ -7,7 +7,7 @@ on:
 jobs:
   triage_or_add_to_project:
     runs-on: ubuntu-latest
-    
+
     env:
       GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
@@ -21,4 +21,4 @@ jobs:
       - name: Apply "needs triage" label to issues created by non-maintainers
         if: steps.check_maintainer.outputs.is_maintainer == 'false'
         run: |
-          gh issue edit ${{ github.event.number }} --add-label "needs-triage" --repo ${{ github.repository }}
+          gh issue edit ${{ github.event.issue.number }} --add-label "needs-triage" --repo ${{ github.repository }}