update event links

Author: andimarek

themes/hugo-sustain/layouts/workshops/list.html

@@ -21,8 +21,8 @@
 <br/>
                   <p><strong>We are happy to announce the first two workshops:</strong></p>
                   <div class="workshops-schedule">
-                      <a target="_blank" href="https://www.eventbrite.com.au/e/introduction-into-graphql-with-java-us-time-tickets-141390196885"><button> 16th of April (US time) </button></a>
-                      <a target="_blank" href="https://www.eventbrite.com.au/e/introduction-into-graphql-with-java-europe-time-tickets-141394383407"><button> 23th of April (Europe time) </button></a>
+                      <a target="_blank" href="https://www.tickettailor.com/events/graphqljava/490772"><button> 16th of April (US time) </button></a>
+                      <a target="_blank" href="https://www.tickettailor.com/events/graphqljava/490833"><button> 23th of April (Europe time) </button></a>
                   </div>
                     <br/>
                     Please click on the Date you want to buy a registration for.