bug: fix the build

Author: slack

src/applications/deploying-apps.md

@@ -14,7 +14,7 @@ Fortunately, most modern applications feature a stateless application tier that
 ## Login to the Controller
 
 !!! important
-	if you haven't yet, now is a good time to [install the client][install client] and [register](../using-workflow/registering-a-user.md).
+	if you haven't yet, now is a good time to [install the client][install client] and [register](../using-workflow/users-and-registration.md).
 
 Before deploying an application, users must first authenticate against the Deis [Controller][]
 using the URL supplied by their Deis administrator.