Fixes #20719: Cancel button now works

http://projects.theforeman.org/issues/20719

engines/bastion_katello/app/assets/javascripts/bastion_katello/activation-keys/new/views/activation-key-new.html

@@ -70,7 +70,7 @@ <h2 translate>New Activation Key</h2>
       </span>
 
       <div bst-form-buttons
-           on-cancel="transitionTo('activation-keys ')"
+           on-cancel="transitionTo('activation-keys')"
            on-save="save(activationKey)"
            working="working">
       </div>