Update index.mdx

React does not extend the fetch API, the memoization logic is injected by next.js

docs/01-app/03-building-your-application/04-caching/index.mdx

@@ -33,7 +33,7 @@ Caching behavior changes depending on whether the route is statically or dynamic
 
 ## Request Memoization
 
-React extends the [`fetch` API](#fetch) to automatically **memoize** requests that have the same URL and options. This means you can call a fetch function for the same data in multiple places in a React component tree while only executing it once.
+Next.js extends the [`fetch` API](#fetch) to automatically **memoize** requests that have the same URL and options. This means you can call a fetch function for the same data in multiple places in a React component tree while only executing it once.
 
 <Image
   alt="Deduplicated Fetch Requests"