docs(component-communication): remove _ from private _timerComponent

Author: dreambo8563

public/docs/ts/latest/cookbook/component-communication.jade

@@ -252,7 +252,7 @@ a(id="countdown-tests")
 
   We import references to the `ViewChild` decorator and the `AfterViewInit` lifecycle hook.
 
-  We inject the child `CountdownTimerComponent` into the private `_timerComponent` property
+  We inject the child `CountdownTimerComponent` into the private `timerComponent` property
   via the `@ViewChild` property decoration.
 
   The `#timer` local variable is gone from the component metadata.