runtime(doc): Add pi_tutor.txt to help TOC

closes: #16006

Signed-off-by: h-east <h.east.727@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/help.txt b/runtime/doc/help.txt
index faa5f32..77ea273 100644
--- a/runtime/doc/help.txt
+++ b/runtime/doc/help.txt
@@ -1,4 +1,4 @@
-*help.txt*	For Vim version 9.1.  Last change: 2024 May 27
+*help.txt*	For Vim version 9.1.  Last change: 2024 Nov 07
 
 			VIM - main help file
 									 k
@@ -232,6 +232,7 @@
 |pi_paren.txt|     Highlight matching parens
 |pi_spec.txt|      Filetype plugin to work with rpm spec files
 |pi_tar.txt|       Tar file explorer
+|pi_tutor.txt|     Interactive tutorial for Vim
 |pi_vimball.txt|   Create a self-installing Vim script
 |pi_zip.txt|       Zip archive explorer