doc: fix skeleton text

Author: 7underlines

apps/website/src/routes/docs/styled/skeleton/index.mdx

@@ -8,7 +8,7 @@ import { statusByComponent } from '~/_state/component-statuses';
 
 # Skeleton
 
-Visually or semantically separates content.
+Skeleton placeholders are temporary content layout previews.
 
 <Showcase name="hero" />