Simplify HTMLTokenizer::isAppropriateEndTag() by leveraging `WTF::equal(LChar*, UChar*, unsigned)`.
Pull request: https://github.com/WebKit/WebKit/pull/18628
Committed 268870@main (ae65b1cf3e1b): <https://commits.webkit.org/268870@main> Reviewed commits have been landed. Closing PR #18628 and removing active labels.
<rdar://problem/116483189>