Avoid use of uncheckedAppend() in JSC::YarrBoyerMooreData. Vector::appendVector() is more concise and has better performance now that Vector::uncheckedAppend() has become an alias to Vector::append().
Pull request: https://github.com/WebKit/WebKit/pull/18601
Committed 268864@main (274bb448e696): <https://commits.webkit.org/268864@main> Reviewed commits have been landed. Closing PR #18601 and removing active labels.
<rdar://problem/116480108>