runtime(doc): correct Vim patch for Wayland support

Signed-off-by: Christian Brabandt <cb@256bit.org>

Author: chrisbra

runtime/doc/gui_x11.txt

@@ -650,7 +650,7 @@ won't give an error message, Vim will crash later).
 
 							*gui-wayland*
 Initial support for the Wayland display server protocol has landed in patch
-9.0.0064. To enable it, you need to set the environment variable
+9.1.0064. To enable it, you need to set the environment variable
 "$GVIM_ENABLE_WAYLAND" in your shell.
 
 Note: The Wayland protocol is subject to some restrictions, so the following