update_service: remove trailing whitespace

app/services/projects/update_service.rb

@@ -6,7 +6,7 @@ module Projects
       if new_visibility && new_visibility.to_i != project.visibility_level
         unless can?(current_user, :change_visibility_level, project) &&
           Gitlab::VisibilityLevel.allowed_for?(current_user, new_visibility)
-          
+
           deny_visibility_level(project, new_visibility)
           return project
         end