runtime(doc): include a TOC Vim9 plugin

closes: #10446

See :h help-TOC

Signed-off-by: lagygoill <lacygoill@lacygoill.me>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/version9.txt b/runtime/doc/version9.txt
index 2a38466..66f98e1 100644
--- a/runtime/doc/version9.txt
+++ b/runtime/doc/version9.txt
@@ -1,4 +1,4 @@
-*version9.txt*  For Vim version 9.1.  Last change: 2024 Oct 27
+*version9.txt*  For Vim version 9.1.  Last change: 2024 Nov 02
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -41602,6 +41602,7 @@
   selection in the quickfix list with the "u" action.
 - the putty terminal is detected using an |TermResponse| autocommand in
   |defaults.vim| and Vim switches to a dark background
+- the |help-TOC| package is included to ease navigating the documentation.
 
 							*added-9.2*
 Added ~