[CI] Fix syntax in rerun workflows logic (#28400)

[ci skip]

.github/workflows/rerun-workflows.yml

@@ -9,7 +9,7 @@ on:
 jobs:
   rerun-on-failure:
     runs-on: ubuntu-latest
-    if: ${{ github.event.workflow_run.conclusion }} == 'failure'
+    if: ${{ github.event.workflow_run.conclusion == 'failure' }}
     steps:
       - uses: actions/github-script@v6
         with: