runtime(doc): update and remove  some invalid links

closes: #14748

Co-authored-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/gui.txt b/runtime/doc/gui.txt
index de33c9c..3b55919 100644
--- a/runtime/doc/gui.txt
+++ b/runtime/doc/gui.txt
@@ -1,4 +1,4 @@
-*gui.txt*       For Vim version 9.1.  Last change: 2024 May 01
+*gui.txt*       For Vim version 9.1.  Last change: 2024 May 11
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -1238,7 +1238,8 @@
 	endif
 
 A recommended Japanese font is MS Mincho.  You can find info here:
-http://www.lexikan.com/mincho.htm
+https://learn.microsoft.com/en-us/typography/font-list/ms-mincho
+It should be distributed with Windows.
 
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 8. Shell Commands					*gui-shell*