Fix new Countdown link

Summary: Correct the url for edit engine. Fixes T11046

Test Plan: new install -> clicky green button

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Maniphest Tasks: T11046

Differential Revision: https://secure.phabricator.com/D16078

src/applications/countdown/query/PhabricatorCountdownSearchEngine.php

@@ -147,7 +147,7 @@ final class PhabricatorCountdownSearchEngine
     $create_button = id(new PHUIButtonView())
       ->setTag('a')
       ->setText(pht('Create a Countdown'))
-      ->setHref('/countdown/create/')
+      ->setHref('/countdown/edit/')
       ->setColor(PHUIButtonView::GREEN);
 
     $icon = $this->getApplication()->getIcon();