Update Footer with HTTPS hyperlinks

Update two non-secure hyperlinks to their secure equivalents.

templates/footer.html

@@ -1,5 +1,5 @@
 <footer>
-  <p>Except as otherwise noted, the content of this page is licensed under a <a href="http://creativecommons.org/licenses/by/2.5/">Creative Commons Attribution 2.5 license</a>, and examples are licensed under the <a href="http://src.chromium.org/viewvc/chrome/trunk/src/LICENSE">BSD License</a>.</p>
+  <p>Except as otherwise noted, the content of this page is licensed under a <a href="https://creativecommons.org/licenses/by/2.5/">Creative Commons Attribution 2.5 license</a>, and examples are licensed under the <a href="https://src.chromium.org/viewvc/chrome/trunk/src/LICENSE">BSD License</a>.</p>
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     {% if user %}
       <b>{{user.email}}</b>