include namespace in project path for system hook

app/services/system_hooks_service.rb

@@ -25,7 +25,7 @@ class SystemHooksService
     when Project
       data.merge!({
         name: model.name,
-        path: model.path,
+        path: model.path_with_namespace,
         project_id: model.id,
         owner_name: model.owner.name,
         owner_email: model.owner.email