Fixing incorrect link in footer.

diff --git a/2015/footer.html b/2015/footer.html
index 679b979e7ad44071303b1d4fa3216bfc94d6033d..18c027a0322217b1020fcde032fdcb2e376b8581 100644 (file)
--- a/2015/footer.html
+++ b/2015/footer.html
@@ -26,7 +26,7 @@
       </a>
       Except where otherwise noted, this site and its images, logos and and other media are licensed under <br />
       <a rel="license"
-        href="http://creativecommons.org/licenses/by/4.0/">
+        href="http://creativecommons.org/licenses/by-sa/4.0/">
        Creative Commons Attribution-ShareAlike 4.0</a>.
       Copyright &copy; 2014-2015 Free Software Foundation.
     </p>