Update agenda for March 2026 meeting (#98)

Added Mark Larah to the attendee list and included GAP-10 discussion.

Author: magicmark

agendas/2026/03-Mar/26-graphql-ai-wg-march-2026.md

@@ -23,6 +23,7 @@
 | Name             | GitHub        | Organization       | Location              |
 | :--------------- | :------------ | :----------------- | :-------------------- |
 | Dale Seo	       | @DaleSeo	     | Apollo	            | Toronto, ON, CA       |
+| Mark Larah       | @magicmark  	 | Yelp 	            | Austin, TX, USA       |
 
 
 ## Agenda
@@ -38,3 +39,5 @@
 1. Review agenda (2m, Host)
 1. Check for [ready for review agenda items](https://github.com/graphql/ai-wg/issues?q=is%3Aissue+is%3Aopen+label%3A%22Ready+for+review+%F0%9F%99%8C%22+sort%3Aupdated-desc) (5m, Host)
 1. Reminder: [grants available for key initiatives](https://graphql.org/community/foundation/community-grant/) (1m, Host)
+1. GAP-10: `@mock` spec (20m, Mark)
+   - https://github.com/graphql/gaps/pull/10