fix: add RouterOutlet import to ChildRouteComponent

Author: yogeshchoudhary147

projects/playground/src/app/components/child-route.component.ts

@@ -1,4 +1,5 @@
 import { Component } from '@angular/core';
+import { RouterOutlet } from '@angular/router';
 
 @Component({
   selector: 'app-child-route',
@@ -8,5 +9,6 @@ import { Component } from '@angular/core';
     <router-outlet></router-outlet>
   `,
   styles: [],
+  imports: [RouterOutlet],
 })
 export class ChildRouteComponent {}