Note for ReadableStreamDefaultReader.close is confusing

[surma]

The note for ReadableStreamDefaultReader.close currently reads:

The closed getter returns a promise that will be fulfilled when the stream becomes closed or the reader’s lock is released, or rejected if the stream ever errors.

@jakearchibald and I think that is not correct.

@jakearchibald’s suggestion for the note:

The closed getter returns a promise that will be fulfilled when the stream becomes closed. It rejects if the reader’s lock is released or the stream errors.