Merge pull request #636 from Shopify/vs/fix_benchmark_exit_status

Fix benchmark exit status

Author: vinistock

.github/workflows/benchmark.yml

@@ -58,11 +58,8 @@ jobs:
       # Fail the job based on the benchmark output
       - name: Finalize job
         run: |
-          REPORT="${{ steps.benchmark.outputs.REPORT }}"
-          IS_SLOWER=$(grep "At least one benchmark is slower than the main branch" <<< "$REPORT")
-          IS_MISSING=$(grep "Missing benchmarks" <<< "$REPORT")
-
-          if [[ $IS_SLOWER || $IS_MISSING ]]; then
+          report="${{ steps.benchmark.outputs.REPORT }}"
+          if [[ "$report" == *"At least one benchmark is slower than the main branch"* ]] || [[ "$report" == *"Missing benchmarks"* ]]; then
             exit 1
           else
             exit 0