webstreams: narrow ReadableStreamBYOBRequest.view to Uint8Array

ReadableStreamBYOBRequest.view is always constructed as a Uint8Array,
and the specification will be updated to enforce this. Reflect this
by changing the documented return type from ArrayBufferView to
Uint8Array.

Refs: whatwg/streams#1367
Fixes: #62952

Author: vedparkasharya

lib/internal/webstreams/readablestream.js

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