patch 9.1.0476: Cannot see matched text in popup menu

Problem:  Cannot see matched text in popup menu
Solution: Introduce 2 new highlighting groups: PmenuMatch and
          PmenuMatchSel (glepnir)

ping @habamax, @neutaaaaan @romainl because vim/colorschemes may need
some updates, @lifepillar for updating vim-colortemplate

closes: #14694

Signed-off-by: glepnir <glephunter@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/syntax.txt b/runtime/doc/syntax.txt
index b6b3d8e..9d8af85 100644
--- a/runtime/doc/syntax.txt
+++ b/runtime/doc/syntax.txt
@@ -1,4 +1,4 @@
-*syntax.txt*	For Vim version 9.1.  Last change: 2024 Jun 09
+*syntax.txt*	For Vim version 9.1.  Last change: 2024 Jun 11
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -5681,6 +5681,11 @@
 PmenuSbar	Popup menu: Scrollbar.
 							*hl-PmenuThumb*
 PmenuThumb	Popup menu: Thumb of the scrollbar.
+							*hl-PmenuMatch*
+PmenuMatch	Popup menu: Matched text in normal item
+							*hl-PmenuMatchSel*
+PmenuMatchSel	Popup menu: Matched text in selected item
+
 							*hl-PopupNotification*
 PopupNotification
 		Popup window created with |popup_notification()|.  If not