fix(demo): Forgot dtTrigger in rerender example #1087

Author: l-lin

demo/src/app/advanced/rerender-snippet.component.ts

@@ -21,7 +21,7 @@ export class RerenderSnippetComponent {
     Rerender
   </button>
 </p>
-&lt;table datatable [dtOptions]="dtOptions" class="row-border hover"&gt;&lt;/table&gt;</code>
+&lt;table datatable [dtOptions]="dtOptions" [dtTrigger]="dtTrigger" class="row-border hover"&gt;&lt;/table&gt;</code>
 </pre>
   `;