ci: use blacksmith runners in review workflow too (#5042)

.github/workflows/review.yml

@@ -14,7 +14,7 @@ jobs:
       (github.event_name == 'issue_comment' &&
        github.event.issue.pull_request &&
        startsWith(github.event.comment.body, '/review'))
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-4vcpu-ubuntu-2404
     permissions:
       contents: read
       pull-requests: write