Update notification-api with link to up-to-date explainer (#206)

* Add reference to most recent AriaNotify explainer

* Update notification API with link to up-to-date explainer.

* Add a note in README.md pointing to updated explainer.

* Update contacts

README.md

@@ -25,14 +25,18 @@ Read the [Spec](https://wicg.github.io/aom/spec/) - note, not up-to-date
 
 ## Accessibility (ARIA) Notification API
 
+**Note notification-api.md is outdated. For the up-to-date explainer of this initiative, please [click here](https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Accessibility/AriaNotify/explainer.md).**
+
 This effort aims to create a JavaScript API to allow developers to
 initiate notifications that confirm user actions (not necessarily tied 
 to direct UI changes).
 
 ### Editors:
 
+* Sara Tang, Microsoft, sartang@microsoft.com
+* Doug Geoffray, Microsoft, doug.geoffray@microsoft.com
+* Alison Maher, Microsoft, almaher@microsoft.com
 * Travis Leithead, Microsoft, travil@microsoft.com
-* Sara Tang, Microsoft
 * Daniel Libby, Microsoft
 
 ### Details

notification-api.md

@@ -1,8 +1,9 @@
 # Accessibility (ARIA) Notification API
+**Note: This explainer is no longer being maintained. For the most up-to-date version of this feature, please [click here](https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Accessibility/AriaNotify/explainer.md).**
 
 Authors: 
-* [Daniel Libby](https://github.com/dlibby-), Microsoft
 * [Sara Tang](https://github.com/sartang), Microsoft
+* [Daniel Libby](https://github.com/dlibby-), Microsoft
 * [Travis Leithead](https://github.com/travisleithead), Microsoft