lib: narrow ReadableStreamBYOBRequest.view return type to Uint8Array

Follow WHATWG streams spec update: whatwg/streams#1367

ReadableStreamBYOBRequest.view is always constructed as a Uint8Array.

This changes the documented return type from ArrayBufferView to

Uint8Array per the updated spec.

Fixes: #62952

Author: Jah-yee

lib/internal/webstreams/readablestream.js

@@ -672,7 +672,7 @@ class ReadableStreamBYOBRequest {
 
   /**
    * @readonly
-   * @type {ArrayBufferView}
+   * @type {Uint8Array}
    */
   get view() {
     if (!isReadableStreamBYOBRequest(this))