Backport PR #1160: Trigger update snapshots based on commenter's role

.github/workflows/update-snapshots.yml

@@ -12,12 +12,11 @@ jobs:
   update-snapshots:
     if: >
       (
-        github.event.issue.author_association == 'OWNER' ||
-        github.event.issue.author_association == 'COLLABORATOR' ||
-        github.event.issue.author_association == 'MEMBER'
+        github.event.comment.author_association == 'OWNER' ||
+        github.event.comment.author_association == 'COLLABORATOR' ||
+        github.event.comment.author_association == 'MEMBER'
       ) && github.event.issue.pull_request && contains(github.event.comment.body, 'please update snapshots')
     runs-on: ubuntu-latest
-
     steps:
       - name: React to the triggering comment
         run: |
@@ -74,7 +73,7 @@ jobs:
       - uses: jupyterlab/maintainer-tools/.github/actions/update-snapshots@v1
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
-          start_server_script: 'null'
+          start_server_script: "null"
           test_folder: packages/jupyter-ai/ui-tests
           npm_client: jlpm