chore(gh-workflow): apply maintainer response label only to open issues (#14172)

Author: tiffanynwyeung

.github/workflows/issue-comment.yml

@@ -19,8 +19,8 @@ jobs:
         shell: bash
         run: |
           gh issue edit $ISSUE_NUMBER --repo $REPOSITORY_NAME --remove-label "pending-community-response"
-      - name: Add pending-maintainer-response when new community comment received
-        if: ${{ !contains(fromJSON('["MEMBER", "OWNER"]'), github.event.comment.author_association) }}
+      - name: Add pending-maintainer-response when new community comment received on open issues
+        if: ${{ !contains(fromJSON('["MEMBER", "OWNER"]'), github.event.comment.author_association) && github.event.issue.state == 'open' }}
         shell: bash
         run: |
           gh issue edit $ISSUE_NUMBER --repo $REPOSITORY_NAME --add-label "pending-maintainer-response"