WebCodecs AV1 codec string validation is buggy
<rdar://problem/122084515>
https://github.com/WebKit/WebKit/pull/23659 (not sure why this wasn't posted automatically)
Committed 274089@main (f3073fb3636d): <https://commits.webkit.org/274089@main> Reviewed commits have been landed. Closing PR #23659 and removing active labels.