[gedit-plugins] help: External link must be href, not xref

[Andre Klapper <aklapper src gnome org>]

commit 6987d6c7bc937fad9f6f59630d3879d9371d6c9e
Author: Andre Klapper <a9016009 gmx de>
Date:   Sun Sep 17 03:37:21 2017 +0200

    help: External link must be href, not xref

 help/C/legal-plugins.xml |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/help/C/legal-plugins.xml b/help/C/legal-plugins.xml
index 68e3a0f..f729d20 100644
--- a/help/C/legal-plugins.xml
+++ b/help/C/legal-plugins.xml
@@ -4,7 +4,7 @@
 
   <p>This work is licensed under the Creative Commons Attribution-ShareAlike
   3.0 Unported License. To view a copy of this license, visit
-  <link 
xref="http://creativecommons.org/licenses/by-sa/3.0/";>http://creativecommons.org/licenses/by-sa/3.0/</link>
+  <link 
href="http://creativecommons.org/licenses/by-sa/3.0/";>http://creativecommons.org/licenses/by-sa/3.0/</link>
   or send a letter to Creative Commons, 444 Castro Street, Suite 900, Mountain
   View, California, 94041, USA.</p>