[gnome-user-docs] gnome-help: Add namespace for non-translatable image

[Andre Klapper <aklapper src gnome org>]

commit 0bf0661c7e31675574e098b02839ca363ccac7f9
Author: Andre Klapper <a9016009 gmx de>
Date:   Fri Mar 5 09:29:20 2021 +0100

    gnome-help: Add namespace for non-translatable image

 gnome-help/C/gnome-classic.page | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/gnome-help/C/gnome-classic.page b/gnome-help/C/gnome-classic.page
index 86be5844..595a2709 100644
--- a/gnome-help/C/gnome-classic.page
+++ b/gnome-help/C/gnome-classic.page
@@ -1,5 +1,6 @@
 <page xmlns="http://projectmallard.org/1.0/";
       xmlns:if="http://projectmallard.org/if/1.0/";
+      xmlns:its="http://www.w3.org/2005/11/its";
       type="topic" style="question" version="1.0 if/1.0"
       id="gnome-classic">