Remove under development notice from PushState based navigation (#10733)

documentation/advanced/advanced-navigator.asciidoc

@@ -63,7 +63,7 @@ public class NavigatorUI extends UI {
 
 The [classname]#Navigator# automatically parses the URI to identify and show the [interfacename]#View#. The browser navigation back and forward are also handled by it.
 
-Starting from [literal]#++8.2.0.alpha2++# there is also PushState based navigation. This new way for the Navigator to manage URLs is described here as well. It is still under development so changes are expected. To enable this feature, add the [classname]#PushStateNavigation# annotation to your UI.
+Starting from [literal]#++8.2.0++# there is also PushState based navigation. This new way for the Navigator to manage URLs is described here as well. To enable this feature, add the [classname]#PushStateNavigation# annotation to your UI.
 
 [[advanced.navigator.navigating.viewprovider]]
 === View Providers