fixed install page url for angular dev guide

Author: ismcagdas

doc/Development-Guide-Angular.html

@@ -690,7 +690,7 @@ <h5>Change Picture</h5>
 <h4>Setup Page</h4>
 <p>
 AspNet Zero application can be set-up using install page. This page is developed to create initial database, apply migrations and configure the application according to user's input on this page.
-Setup page can be accessed via <strong>http://yourwebsite.com/Install</strong>.
+Setup page can be accessed via <strong>http://yourwebsite.com/app/admin/install</strong>.
 </p>
 <p>
 <img class="img-thumbnail" alt="install page" src="images/install-page-core.png" width="1200" />