Updated Land of Quil url to working one. (#100)

I came across a tweet praising Land of Quil and had a hard time finding it.  Google sent me to the ClojureBridge page before I found the Land of Quil repo (https://github.com/jellea/clojure-cup-2015) that has an updated url.

Author: inchingforward

index.html

@@ -146,7 +146,7 @@ <h3>Workshop</h3>
             <a href="https://github.com/clojurebridge-berlin/study-group-curriculum">Study Group Curriculum</a>
           </li>
           <li>
-            <a href="https://github.com/quil/quil">Quil</a> | <a href="http://landofquil.we-do-fp.berlin/"> Quil Examples</a>
+            <a href="https://github.com/quil/quil">Quil</a> | <a href="http://landofquil.clojureverse.org/"> Quil Examples</a>
           </li>
           <li>
             <a href="https://clojurebridge-berlin.github.io/coaches_training.deck.html">Coaches Training Slides</a>