Add persisted-operations to agenda (#256)

Author: JoviDeCroock

working-group/agendas/2023/2023-09-28.md

@@ -98,6 +98,7 @@ This is an open meeting in which anyone in the GraphQL community may attend.
 Name                    | GitHub                 | Organization            | Location
 ----------------------- | ---------------------- | ----------------------- | --------------------------
 Benjie Gillam           | @Benjie                | Graphile                | Southampton, UK
+Jovi De Croock          | @JoviDeCroock          | Stellate                | Aalst, BE
 
 ## Agenda
 
@@ -111,3 +112,4 @@ Benjie Gillam           | @Benjie                | Graphile                | Sou
 1. Determine volunteers for note taking (1m, Organizer)
 1. Review agenda (2m, Organizer)
 1. Review previous meeting's action items (5m, Organizer)
+1. Review [Persisted Operations RFC](https://github.com/graphql/graphql-over-http/blob/main/rfcs/PersistedOperations.md) (5m, @JoviDeCroock)