[empathy] Help: Use stable 'if' namespace instead of experimental

[Andre Klapper <aklapper src gnome org>]

commit 67a24d3b7566a263cce3e84d7ded8e88020cd7ee
Author: Andre Klapper <a9016009 gmx de>
Date:   Tue Jul 10 15:12:17 2018 +0200

    Help: Use stable 'if' namespace instead of experimental

 help/C/irc-manage.page | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/help/C/irc-manage.page b/help/C/irc-manage.page
index 78fef029d..eed49c9c4 100644
--- a/help/C/irc-manage.page
+++ b/help/C/irc-manage.page
@@ -1,6 +1,6 @@
 <page xmlns="http://projectmallard.org/1.0/";
       xmlns:e="http://projectmallard.org/experimental/";
-      xmlns:if="http://projectmallard.org/experimental/if/";
+      xmlns:if="http://projectmallard.org/if/1.0/";
       type="guide" style="2column"
       id="irc-manage">
 
@@ -64,4 +64,4 @@
     <title>Common Problems</title>
   </section>
 
-</page>
\ No newline at end of file
+</page>