docs(aio): update migrated content from anguar.io

aio/content/examples/upgrade-phonecat-4-final/app/app-routing.module.ts

@@ -0,0 +1,23 @@
+// #docregion
+import { NgModule } from '@angular/core';
+import { Routes, RouterModule } from '@angular/router';
+import { APP_BASE_HREF, HashLocationStrategy, LocationStrategy } from '@angular/common';
+
+import { PhoneDetailComponent } from './phone-detail/phone-detail.component';
+import { PhoneListComponent }   from './phone-list/phone-list.component';
+
+const routes: Routes = [
+  { path: '', redirectTo: 'phones', pathMatch: 'full' },
+  { path: 'phones',          component: PhoneListComponent },
+  { path: 'phones/:phoneId', component: PhoneDetailComponent }
+];
+
+@NgModule({
+  imports: [ RouterModule.forRoot(routes) ],
+  exports: [ RouterModule ],
+  providers: [
+    { provide: APP_BASE_HREF, useValue: '!' },
+    { provide: LocationStrategy, useClass: HashLocationStrategy },
+  ]
+})
+export class AppRoutingModule { }