gnucash-docs maint: Fix obsolete guide cross-reference.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash-docs/commit/2b3050d7 (commit)
	from  https://github.com/Gnucash/gnucash-docs/commit/06e9bf3b (commit)



commit 2b3050d776b6ff2c2e15e41cf521aca18ff5e43f
Author: John Ralls <jralls at ceridwen.us>
Date:   Tue Jun 23 11:43:17 2020 -0700

    Fix obsolete guide cross-reference.



Summary of changes:
 help/C/Help_ch_GUIMenus.xml | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)