Fixed stylelint pre-commit config

.pre-commit-config.yaml

@@ -33,7 +33,7 @@ repos:
     rev: v15.10.3
     hooks:
       - id: stylelint
-        files: \.scss$
+        files: \.css$
         additional_dependencies:
           - stylelint@15.11.0
           - stylelint-config-standard@34.0.0