Update registration URL

Author: pathumego

colombotype/index.html

@@ -92,7 +92,7 @@ <h2> Next meeting: <br>
 <hr>
 
 <center>
-<h2> <a class="btn" href="https://pretix.eu/akuru/ct005/"> REGISTER NOW!!!</a><br>
+<h2> <a class="btn" href="https://pretix.eu/akuru/"> REGISTER NOW!!!</a><br>
 </center>