layouts: remove a reference to the bird site.

Author: micrypt

_layouts/index.html

@@ -62,7 +62,7 @@
 				<h2 class="title">About</h2>
 					<p>
                      This is the <a href="/archive.html">writing pad</a> and playground of Seyi Ogunyemi (<a target="_blank"
-                       href="http://twitter.com/micrypt">@micrypt</a>); a
+                       href="https://mastodon.social/@micrypt" rel="me">@micrypt</a>); a
                      student of life based in London (UK), seeking ways to harness
                      technology, design, and the scientific method to benefit humankind.
                     </p>