docs(infinite-scroll): clarify virtual scroll element (#3338)

* docs(infinite-scroll): clarify virtual scroll element

* chore: update content

Author: sean-perkins

docs/api/infinite-scroll.md

@@ -43,7 +43,7 @@ import CustomContent from '@site/static/usage/v7/infinite-scroll/custom-infinite
 
 ## Usage with Virtual Scroll
 
-Infinite scroll requires a scroll container to function. When using a virtual scrolling solution, you will need to disable scrolling on the `ion-content` and indicate which element container is responsible for the scroll container with the `.ion-content-scroll-host` class target.
+Infinite scroll requires a scroll container. When using a virtual scrolling solution, you will need to disable scrolling on the `ion-content` and indicate which element container is responsible for the scroll container with the `.ion-content-scroll-host` class target.
 
 ```html
 <ion-content scroll-y="false">
@@ -56,6 +56,12 @@ Infinite scroll requires a scroll container to function. When using a virtual sc
 </ion-content>
 ```
 
+:::note
+
+`virtual-scroll-element` refers to the scroll container responsible for scrolling the content. This may be a component provided directly by the virtual scroll solution you are using.
+
+:::
+
 ## Accessibility
 
 Developers should assign the `role="feed"` attribute to the scrollable list of items that are added to or removed from as the user scrolls.