runtime(typescriptreact): fix highlighting nested and escaped quotes in string props (#14852)

Signed-off-by: rhysd <lin90162@yahoo.co.jp>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/syntax/typescriptreact.vim b/runtime/syntax/typescriptreact.vim
index 9dc9a2b..061ec4d 100644
--- a/runtime/syntax/typescriptreact.vim
+++ b/runtime/syntax/typescriptreact.vim
@@ -1,7 +1,7 @@
 " Vim syntax file
 " Language:     TypeScript with React (JSX)
 " Maintainer:   The Vim Project <https://github.com/vim/vim>
-" Last Change:  2024 May 24
+" Last Change:  2024 May 26
 " Based On:     Herrington Darkholme's yats.vim
 " Changes:      See https://github.com/HerringtonDarkholme/yats.vim
 " Credits:      See yats.vim on github
@@ -118,7 +118,8 @@
 
 " <tag id="sample">
 "         s~~~~~~e
-syntax region tsxString contained start=+["']+ end=+["']+ contains=tsxEntity,@Spell display
+syntax region tsxString contained start=+"+ skip=+\\"+ end=+"+ contains=tsxEntity,@Spell display
+syntax region tsxString contained start=+'+ skip=+\\'+ end=+'+ contains=tsxEntity,@Spell display
 
 " <tag key={this.props.key}>
 "          s~~~~~~~~~~~~~~e