Change URL references to repo location on github.

totp.html

@@ -213,7 +213,7 @@ <h1>TOTP Debugger</h1>
     key on the same machine that you use for accessing your account. Doing so
     completely defeats the security of two-step verification.</p>
     <p>Instead, use one of the mobile phone clients made available by the
-    <a href="http://code.google.com/p/google-authenticator">Google
+    <a href="https://github.com/google/google-authenticator">Google
     Authenticator</a> project. Or follow the <a href="http://www.google.com/support/accounts/bin/static.py?hl=en&page=guide.cs&guide=1056283&topic=1056285">instructions</a>
     provided by Google.</p>
     <p>If you ever entered your real secret key into this website, please