correct exit statement on the last step

Author: Blargian

.github/workflows/check-build.yml

@@ -55,6 +55,6 @@ jobs:
         run: |
           if [[ "${{ steps.spellcheck.outcome }}" == "failure" ]] && [[ "${{ steps.kbcheck.outcome }}" == "failure" ]]; then
             echo "Style check failed. See the logs for details."
-          exit 1
+            exit 1
           fi