chore(typo): fix a typo about [{}] reported in feedback

public/docs/ts/latest/guide/template-syntax.jade

@@ -643,7 +643,7 @@ code-example(format="", language="html").
   That’s an improvement. It should be better.
 
   We shouldn't have to mention the data property twice. Angular should be able to read the component’s data property and set it
-  with a single declaration — which it can with the `[{ }]` syntax:
+  with a single declaration — which it can with the `[( )]` syntax:
 +makeExample('template-syntax/ts/app/app.component.html', 'NgModel-1')(format=".")
 
 .l-sub-section