re-add line I accidentally removed

Author: kathrinschalber

docs/components/application-menu/code.mdx

@@ -16,6 +16,7 @@ import AvatarPropsApi from '@site/docs/autogenerated/api/ix-menu-avatar/api.mdx'
 import AvatarItemPropsApi from '@site/docs/autogenerated/api/ix-menu-avatar-item/api.mdx';
 import AvatarTags from '@site/docs/autogenerated/api/ix-menu-avatar/tags.mdx';
 
+import VerticalTabsPlayground from '@site/docs/autogenerated/playground/vertical-tabs.mdx';
 import MenuCategoryPlayground from '@site/docs/autogenerated/playground/menu-category.mdx';
 import MenuWithBottomTabsPlayground from '@site/docs/autogenerated/playground/menu-with-bottom-tabs.mdx';