[docs] Fix typo (#2984)

i'm ~90% sure what i'm proposing is what was actually intended.

docs/src/docs/core/ScrollArea.mdx

@@ -23,7 +23,7 @@ It is adapted to work well with light and dark color schemes and supports the fo
 - `type` defines scrollbars behavior:
   - `hover` – scrollbars are visible on hover
   - `scroll` – scrollbars are visible on scroll
-  - `auto` – similar to `overflow: auto` – scrollbars are always visible whether the content is overflowing
+  - `auto` – similar to `overflow: auto` – scrollbars are always visible when the content is overflowing
   - `always` – same as `auto` but scrollbars are always visible regardless of whether the content is overflowing
   - `never` – scrollbars are always hidden
 - `offsetScrollbars` – offset scrollbars with padding