Update wait-for-checks.yml

Author: cheap-glitch

.github/workflows/wait-for-checks.yml

@@ -16,5 +16,5 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - run: sleep 10
-      - if: contains(github.event.head_commit.message, "FAIL")
+      - if: contains(github.event.head_commit.message, 'FAIL')
         run: exit 1