feat: updating custom react SEO docs (#1013)

Co-authored-by: Kapil Gowru <[email protected]>

Author: fern-support

fern/products/docs/pages/component-library/custom-components/custom-react-components.mdx

@@ -77,6 +77,6 @@ While you can bundle React components as custom JavaScript, using Fern's built-i
   </Accordion>
 
   <Accordion title="Improved SEO">
-    Components added via custom JavaScript aren't server-side rendered, which means search engines can't index content.
+    Custom React components are server-side rendered and fully indexable by search engines, while components added via custom JavaScript aren't server-side rendered and can't be indexed.
   </Accordion>
 </AccordionGroup>