Extend __typename at subscription root RFC discussion (#669)

Author: benjie

agendas/2021-05-06.md

@@ -71,7 +71,9 @@ Example agenda item:
    - Status Update
    - Fields vs Input Objects
 1. [Glossary RFC](https://github.com/graphql/graphql-spec/pull/846) (15m, Benjie)
-1. [Advancing `__typename` not valid at subscription root RFC](https://github.com/graphql/graphql-spec/pull/776) (5m, Benjie)
-   - Ivan has approved [the GraphQL.js changes](https://github.com/graphql/graphql-js/pull/2861)
-   - Main question: have other implementors had a chance to look at this yet?
+1. [Advancing `__typename` not valid at subscription root RFC](https://github.com/graphql/graphql-spec/pull/776) (30m, Benjie)
+   - Ivan approved [the GraphQL.js changes](https://github.com/graphql/graphql-js/pull/2861)
+   - Have since updated the implementation to more closely mirror the spec.
+   - Potential validation oversight - @skip/@include; see related RFC: https://github.com/graphql/graphql-spec/pull/860
+   - Question: have other implementors had a chance to look at this yet?
 1. *ADD YOUR AGENDA ABOVE*