Update packages/fetch-http-handler/README.md

Co-authored-by: Trivikram Kamat <[email protected]>

Author: kuhe

packages/fetch-http-handler/README.md

@@ -4,8 +4,8 @@
 [![NPM downloads](https://img.shields.io/npm/dm/@smithy/fetch-http-handler.svg)](https://www.npmjs.com/package/@smithy/fetch-http-handler)
 
 This is the default `requestHandler` used for browser applications.
-Although some versions of Node.js support the web streams API, this implementation has
-not been extensively tested in Node.js.
+Since Node.js introduced experimental Web Streams API in v16.5.0 and made it stable in v21.0.0,
+you can consider using `fetch-http-handler` in Node.js, although it's not recommended.
 
 For the Node.js default `requestHandler` implementation, see instead
 [`@smithy/node-http-handler`](https://www.npmjs.com/package/@smithy/node-http-handler).