runtime(html): Update syntax file (#13591) Commit: https://github.com/vim/vim/commit/a9058440b7b9d7f5d0027c8cd44366e9200ca241 Author: dkearns <dougkearns@gmail.com> Date: Wed Nov 29 06:41:41 2023 +1100 runtime(html): Update syntax file (https://github.com/vim/vim/issues/13591) Add missing search element and update ARIA attribute list. Add a very basic test file to check all elements are matched. Signed-off-by: Christian Brabandt <cb@256bit.org>