Fixed lint on extension/advertise/google

upload/admin/language/en-gb/extension/advertise/google.php

@@ -319,4 +319,4 @@
 $_['error_store_url_claim'] = 'Your store URL has been claimed by another app. Please connect your merchant account to re-claim the store URL.';
 $_['error_tax'] = 'Please select at least one taxable state.';
 $_['error_used_app_id'] = 'You have already connected this App with another one of your stores. Please disconnect the other store, or use a different App ID.';
-$_['error_warning'] = 'Warning! Please check the form carefully for errors.';
+$_['error_warning'] = 'Warning! Please check the form carefully for errors.';