footer: nabble -> HyperKitty

Author: LinqLover

_includes/footer.html

@@ -3,7 +3,7 @@
     <p class="small">
         &copy; 1996-{{ site.time | date: '%Y' }} {{ site.copyright }} -
         <a href="/imprint/">Imprint</a> -
-        <a href="https://forum.world.st/Squeak-f45487.html" target="_blank"><i class="fa fa-globe"></i></a>
+        <a href="https://lists.squeakfoundation.org/archives/list/[email protected]/" target="_blank"><i class="fa fa-globe"></i></a>
         <a href="https://twitter.com/squeaksmalltalk" target="_blank"><i class="fa fa-twitter"></i></a>
         <a href="https://www.linkedin.com/groups?gid=98736" target="_blank"><i class="fa fa-linkedin"></i></a>
         <a href="https://github.com/squeak-smalltalk" target="_blank"><i class="fa fa-github"></i></a>