fix: run only if benchmark was a success

Author: b-ma

.github/workflows/benchmark-post-result.yaml

@@ -16,6 +16,8 @@ on:
 jobs:
   upload:
     runs-on: ubuntu-latest
+    if: ${{ github.event.workflow_run.conclusion == 'success' }}
+
     steps:
       - name: "Download artifact"
         uses: actions/github-script@v6