Add Benjie and various topics to 2021-01 WG (#569)

Author: benjie

agendas/2021-01-07.md

@@ -28,6 +28,7 @@ agenda, edit this file.*
 | Name                     | Organization / Project   | Location
 | ------------------------ | ------------------------ | ------------------------
 | Lee Byron                | GraphQL Foundation       | San Francisco, CA, US
+| Benjie Gillam            | Graphile                 | Southampton, UK
 | *ADD YOUR NAME ABOVE TO ATTEND*
 
 
@@ -58,4 +59,13 @@ Example agenda item:
 1. Review agenda (2m, Lee)
 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)
+   - Input Unions WG 7pm UTC (11am PST, 6am AEDT) on Thursday 21st Jan ([Details in Slack](https://graphql.slack.com/archives/CTECCMU57/p1608223711031900?thread_ts=1606562127.018400&cid=CTECCMU57))
+1. Advancing no introspection at root of Subscription operation (Benjie, 10m)
+   - [Spec PR](https://github.com/graphql/graphql-spec/pull/776)
+   - [GraphQL.js validation rule](https://github.com/graphql/graphql-js/pull/2861)
+1. Default value coercion update (Benjie, 15m)
+   - [Spec PR](https://github.com/graphql/graphql-spec/pull/793)
+   - How do we write spec language to prevent infinite recursion?
+1. Query ambiguity: replacing 'query error' with 'request error' (Benjie, 15m)
+   - [Spec PR](https://github.com/graphql/graphql-spec/pull/803)
 1. *ADD YOUR AGENDA ABOVE*