correction: router sample correction

public/docs/ts/latest/guide/router.jade

@@ -1226,7 +1226,7 @@ h3#merge-hero-routes 把英雄区的路由合并到应用程序的路由中
 
   把`app.routes.ts`改成这样：
 
-+makeExample('router/ts/app/app.routes.3.ts', '', 'app/app.routes.ts (v.2)')(format=".")
++makeExample('router/ts/app/app.routes.2.ts', '', 'app/app.routes.ts (v.2)')(format=".")
 
 :marked
   We replace the `HeroListComponent` import with an `HeroesRoutes` import.
@@ -1561,8 +1561,8 @@ h3#nav-to-list 导航回列表组件
   这里是当前版本的范例程序相关文件。
 
 +makeTabs(
-  `router/ts/app/app.component.1.ts,
-   router/ts/app/app.routes.3.ts,
+  `router/ts/app/app.component.2.ts,
+   router/ts/app/app.routes.2.ts,
    router/ts/app/heroes/hero-list.component.1.ts,
    router/ts/app/heroes/hero-detail.component.1.ts,
    router/ts/app/heroes/hero.service.ts,