Fix doc on CloseButton::bundle()

src/widgets/mod.rs

@@ -184,7 +184,7 @@ impl BigRedButton {
 pub struct CloseButton(Entity);
 
 impl CloseButton {
-  /// Spawn a button that will despawn the top-most node when pressed.
+  /// Default bundle for a panel's close button. Pass in the entity to despawn.
   ///
   /// TODO: Pass in the UiTheme struct
   fn bundle(target: Entity) -> impl Bundle {