[3.12] gh-118350: Fix support of elements "textarea" and "title" in HTMLParser (GH-135310) (GH-136986)

(cherry picked from commit 4d02f31cdd45d81b95540d9076222b709d4f2335)

Co-authored-by: Timon Viola <44016238+timonviola@users.noreply.github.com>
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
Co-authored-by: Łukasz Langa <lukasz@langa.pl>