docs: update supported menu links to point to apg

Fixes #30

README.md

@@ -11,9 +11,9 @@ This project is an extension of [accessible-menu](https://github.com/NickDJM/acc
 
 The supported menu types are:
 
-- [Disclosure Navigation Menus](https://www.w3.org/TR/wai-aria-practices-1.2/examples/disclosure/disclosure-navigation.html)
-- [Navigation Menubar](https://www.w3.org/TR/wai-aria-practices-1.2/examples/menubar/menubar-1/menubar-1.html), and
-- [Navigation Treeview](https://www.w3.org/TR/wai-aria-practices-1.2/examples/treeview/treeview-2/treeview-2a.html)
+- [Disclosure Navigation Menus](https://www.w3.org/WAI/ARIA/apg/patterns/disclosure/examples/disclosure-navigation/),
+- [Navigation Menubar](https://www.w3.org/WAI/ARIA/apg/patterns/menubar/examples/menubar-navigation/), and
+- [Navigation Treeview](https://www.w3.org/WAI/ARIA/apg/patterns/treeview/examples/treeview-navigation/)
 
 ## Browser Support