[gnome-user-docs] Fix validation is files.page

[Ekaterina Gerasimova <egerasimov src gnome org>]

commit d70facae943a0f34dd205cac7794b801ce8cda01
Author: Ekaterina Gerasimova <kittykat3756 gmail com>
Date:   Thu Nov 7 22:05:11 2013 +0000

    Fix validation is files.page

 gnome-help/C/files.page |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gnome-help/C/files.page b/gnome-help/C/files.page
index 196a692..3e64599 100644
--- a/gnome-help/C/files.page
+++ b/gnome-help/C/files.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="guide" style="task" version="1.0 if/1.0"
       id="files">