CI change, only run bench on performance label (#4271)

Author: soulomoon

.github/workflows/bench.yml

@@ -17,6 +17,7 @@ on:
 jobs:
   pre_job:
     runs-on: ubuntu-latest
+    if: contains(github.event.pull_request.labels.*.name, 'performance')
     outputs:
       should_skip: ${{ steps.skip_check.outputs.should_skip }}
     steps: