Correct quote

Author: laravel-shift

.github/workflows/tests.yml

@@ -14,7 +14,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
 
-    if: !contains(github.event.head_commit.message, 'ci skip')
+    if: "!contains(github.event.head_commit.message, 'ci skip')"
 
     strategy:
       fail-fast: false