webstreams: narrow `ReadableStreamBYOBRequest.view` to `Uint8Array`

[MattiasBuelens]

ReadableStreamBYOBRequest.view is always constructed as a Uint8Array, and the specification will be updated to enforce this. Spec change: whatwg/streams#1367

We should reflect this by changing the documented return type from ArrayBufferView to Uint8Array here:

node/lib/internal/webstreams/readablestream.js

Lines 672 to 676 in 9f5a2c9

	/**
	* @readonly
	* @type {ArrayBufferView}
	*/
	get view() {

[Jah-yee]

Friendly ping @nodejs/maintainers — this has been waiting for review. The type fix is minimal and targeted. Would appreciate feedback! 🙏