Fix validation error.

_includes/footer.html

@@ -6,7 +6,7 @@
         <p>
           If you have questions or issues, it is always best to consult a legal professional.<br>
           This site is licensed under the <a href="http://creativecommons.org/licenses/by/3.0/">
-          Creative Commons Attribution 3.0 Unported License</a>.</p>
+          Creative Commons Attribution 3.0 Unported License</a>.
         </p>
         <div id="with-♥">
           Demystified with &lt;3 by <a href="http://github.com">GitHub, Inc.</a>