Update docs/book/src/migration/multi-group.md

docs/book/src/migration/multi-group.md

@@ -59,7 +59,7 @@ Then, your layout has not the internal directory. So, you will move the controll
 mkdir controller/batch
 mv controller/* controller/batch/
 ```
-
+</aside>
 Next, we'll need to update all the references to the old package name.
 For CronJob, the paths to be replaced would be `main.go` and `controllers/batch/cronjob_controller.go` to their respective locations in the new project structure.