Set pipefail in action script

.github/workflows/trigger-merge-checks.yml

@@ -23,6 +23,7 @@ jobs:
       - name: Update merge-checks workflow run
         if: ${{ !contains(github.event.*.labels.*.name, 'design-approved') }}
         run: |
+          set -x pipefail
           if curl -sSL --fail-with-body \
               -H "Accept: application/vnd.github+json" \
               -H "Authorization: Bearer $GITHUB_TOKEN" \