Update wiki address

src/render/index.html.eco

@@ -9,7 +9,7 @@ isPage: true
   <h2>Open-source group communication for the 21st century</h2>
   <nav>
     <ul>
-      <li><a href="https://wiki.67p.io">Wiki</a></li>
+      <li><a href="https://wiki.kosmos.org">Wiki</a></li>
       <li><a href="https://github.com/67P">GitHub</a></li>
       <li><a href="https://twitter.com/KosmosHQ">Twitter</a></li>
     </ul>