[evolution] Help: Use https URL for CC license link

[Andre Klapper <aklapper src gnome org>]

commit defbc4003035aeb83762fed437843b32c2c28d71
Author: Andre Klapper <a9016009 gmx de>
Date:   Tue Jul 10 15:57:13 2018 +0200

    Help: Use https URL for CC license link

 help/C/legal.xml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/help/C/legal.xml b/help/C/legal.xml
index aa36246c7e..93a15e0300 100644
--- a/help/C/legal.xml
+++ b/help/C/legal.xml
@@ -1,8 +1,8 @@
 <license xmlns="http://projectmallard.org/1.0/";
-         href="http://creativecommons.org/licenses/by-sa/3.0/";>
+         href="https://creativecommons.org/licenses/by-sa/3.0/";>
 
   <p>This work is licensed under a
-  <link href="http://creativecommons.org/licenses/by-sa/3.0/";>Creative Commons
+  <link href="https://creativecommons.org/licenses/by-sa/3.0/";>Creative Commons
   Attribution-ShareAlike 3.0 Unported License</link>.</p>
 
 </license>