Update Rubyboulets url.

Author: kvzb

_layouts/default.html

@@ -31,7 +31,7 @@ <h2>Current Meals</h2>
       {% for city in site.cities %}
         <a class="extra" href="/{{ city.first.first }}">{{ city.first.last.name }}</a>
       {% endfor %}
-      <a class="extra" href="http://ruby_boulets.eventbrite.com/">Rubyboulets - Liège</a>
+      <a class="extra" href="http://www.meetup.com/ruby_boulets-rb/">Rubyboulets - Liège</a>
       <a class="extra" href="http://www.meetup.com/ruby_burgers_austin-rb/">Rubyburgers - Austin, TX</a>
       <a class="extra" href="http://hamburg.onruby.de/events/ruby-burgers-oktober" title="Rubyburgers - Hamburg">Rubyburgers - Hamburg, Germany</a>
       <a class="extra" href="http://leipzig.onruby.de/events/lor-november-2013" title="Rubyburgers - Leipzig">Rubyburgers - Leipzig, Germany</a>