Add Mark to December WG meeting (#552)

Author: magicmark

agendas/2020-12-03.md

@@ -29,6 +29,7 @@ agenda, edit this file.*
 | ------------------------ | ------------------------ | ------------------------
 | Lee Byron                | GraphQL Foundation       | San Francisco, CA, US
 | Benjie Gillam ✏️          | Graphile                 | Southampton, UK
+| Mark Larah               | Yelp                     | San Francisco, CA, US
 | *ADD YOUR NAME ABOVE TO ATTEND*
 
 
@@ -60,4 +61,6 @@ Example agenda item:
 1. Review previous meeting's action items (5m, Lee)
    - [All action items](https://github.com/graphql/graphql-wg/issues?q=is%3Aissue+label%3A%22Action+item+%3Aclapper%3A%22)
 1. [RFC: Default value coercion](https://github.com/graphql/graphql-spec/pull/793) (20m, Benjie)
+1. [RFC: Schema coordinates](https://github.com/graphql/graphql-spec/pull/746) (10m, Mark)
+   - To talk about `Foo.baz.bar` vs `Foo.baz(bar:)` ([by popular demand](https://github.com/graphql/graphql-spec/pull/746#discussion_r526365127))
 1. *ADD YOUR AGENDA ABOVE*