Use /users/mikegerwitz Pleroma link

Pleroma, unlike Mastodon with it's single-user instance mode, does not
show my profile by default.  So, link directly to it.

src/about.htm

@@ -65,7 +65,7 @@
     I do not make use of “social media” websites,
       though I may (or may not) respond to queries on websites that I am a
         member of,
-      and I do host my <a href="https://pleroma.mikegerwitz.com/">own Pleroma instance</a>,
+      and I do host my <a href="https://pleroma.mikegerwitz.com/users/mikegerwitz">own Pleroma instance</a>,
         which is compatible with Mastodon.
   </p>
   <p>

src/header.tpl.htm

@@ -24,7 +24,7 @@
           <li><a href="/talks">Talks</a></li>
           <li><a href="/projects">Projects</a></li>
           <li><a href="/papers">Papers</a></li>
-          <li><a href="//pleroma.mikegerwitz.com/" title="My Mastodon Instance">Social</a></li>
+          <li><a href="//pleroma.mikegerwitz.com/users/mikegerwitz" title="My Pleroma Instance">Social</a></li>
         </ul>
       </nav>
     </header>