gnucash-docs maint: Only use localized &url-docs-*; entities

[Frank H.Ellenberger]

Updated	 via  https://github.com/Gnucash/gnucash-docs/commit/96c10304 (commit)
	from  https://github.com/Gnucash/gnucash-docs/commit/35217025 (commit)



commit 96c10304c710524a0c9b1078e3d7f98371b30e46
Author: Frank H. Ellenberger <frank.h.ellenberger at gmail.com>
Date:   Thu Feb 23 23:53:37 2023 +0100

    Only use localized &url-docs-*; entities



Summary of changes:
 guide/C/ch_basics.xml  | 2 +-
 guide/C/ch_invest.xml  | 6 +++---
 guide/de/ch_invest.xml | 2 +-
 guide/ru/ch_invest.xml | 2 +-
 4 files changed, 6 insertions(+), 6 deletions(-)