runtime(typescript): update outdated syntax files

fixes: #14721
fixes: HerringtonDarkholme/yats.vim#277
closes: #14840

Signed-off-by: rhysd <lin90162@yahoo.co.jp>
Signed-off-by: Christian Brabandt <cb@256bit.org>

runtime/doc/syntax.txt

@@ -1,4 +1,4 @@
-*syntax.txt*	For Vim version 9.1.  Last change: 2024 May 11
+*syntax.txt*	For Vim version 9.1.  Last change: 2024 May 24
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -3764,6 +3764,19 @@ set "tf_minlines" to the value you desire.  Example: >
 
 	:let tf_minlines = your choice
 <
+TYPESCRIPT				*typescript.vim* *ft-typescript-syntax*
+				*typescriptreact.vim* *ft-typescriptreact-syntax*
+
+There is one option to control the TypeScript syntax highlighting.
+
+						*g:typescript_host_keyword*
+When this variable is set to 1, host-specific APIs such as `addEventListener`
+are highlighted. To disable set it to zero in your .vimrc: >
+
+	let g:typescript_host_keyword = 0
+<
+The default value is 1.
+
 VIM			*vim.vim*		*ft-vim-syntax*
 			*g:vimsyn_minlines*	*g:vimsyn_maxlines*
 There is a trade-off between more accurate syntax highlighting versus screen