Fix typo in user activity debug log message

app/services/users/activity_service.rb

@@ -16,7 +16,7 @@ module Users
     def record_activity
       Gitlab::UserActivities.record(@author.id)
 
-      Rails.logger.debug("Recorded activity: #{@activity} for User ID: #{@author.id} (username: #{@author.username}")
+      Rails.logger.debug("Recorded activity: #{@activity} for User ID: #{@author.id} (username: #{@author.username})")
     end
   end
 end