Add GraphQLConf to Jan agenda (#1620)

Author: benjie

agendas/2025/01-Jan/09-wg-primary.md

@@ -121,6 +121,10 @@ hold additional secondary meetings later in the month.
 1. Check for [ready for review agenda items](https://github.com/graphql/graphql-wg/issues?q=is%3Aissue+is%3Aopen+label%3A%22Ready+for+review+%F0%9F%99%8C%22+sort%3Aupdated-desc) (5m, Host)
 1. **TSC elections update** (2m, Host)
    - [Election issue](https://github.com/graphql/graphql-wg/issues/1612)
+1. **[GraphQLConf 2025](https://graphql.org/conf/2025/) is happening!** (10m, Benjie)
+   - Amsterdam, Netherlands, Sept 8-10 2025
+   - How can we help you attend? (Feel free to reach out to me privately via Discord or Slack.)
+   - WG track: talk or two from champions, followed by discussions... thoughts?
 1. Changing error handling of subscription streams? (2m, Benjie)
    - [RFC](https://github.com/graphql/graphql-spec/pull/1127) - promote to RFC1?
 1. Add 'extensions' to request (2m, Benjie)