Update security page

Author: alexcrichton

en-US/security.html

@@ -36,8 +36,8 @@ <h2>Reporting a Bug</h2>
 <ul>
     <li>Contact the current security coordinator (<a href="mailto:[email protected]">Steve Klabnik</a>
         (<a href="https://pgp.mit.edu/pks/lookup?op=vindex&amp;search=0xDAE717EFE9424541">public key</a>)) directly.</li>
-    <li>Contact the back-up contact (<a href="mailto:andersrb@gmail.com">Brian Anderson</a>
-        (<a href="https://pgp.mit.edu/pks/lookup?op=vindex&amp;search=0x16457A6368CFF26F">public key</a>)) directly.</li>
+    <li>Contact the back-up contact (<a href="mailto:alex@alexcrichton.com">Alex Crichton</a>
+        (<a href="https://pgp.mit.edu/pks/lookup?op=vindex&amp;search=0x5D54B6F551FF5E33">public key</a>)) directly.</li>
     <li>Post on the <a href="https://internals.rust-lang.org/">internals forums</a>
     or ask in the #rust-internals IRC room on irc.mozilla.org.</li>
 </ul>