Update CheckMainFile.yml

.github/workflows/CheckMainFile.yml

@@ -11,6 +11,6 @@ jobs:
         if cmp -s CookieMonster.js CookieMonsterTest.js; then
             echo '### SUCCESS: CookieMonster is correctly built! ###'
         else
-          echo ### WARNING: CookieMonster.js does not seem to be correct. Have you compiled the source files into the final file using either of the combine files? ###
+            echo '### WARNING: CookieMonster.js does not seem to be correct. Have you compiled the source files into the final file using either of the combine files? ###'
             exit 1
         fi