events: Add changelog entry for generic state_key
@@ -22,6 +22,9 @@ Breaking changes:
* Fix the `RoomMessageEventContent::*_reply_plain` methods that now return a
message with a `formatted_body`, according to the spec. Therefore, they only
accept `OriginalRoomMessageEvent`s like their HTML counterparts.
+* Update the `state_key` field of state events to be of a different type
+ depending on the content type. You now no longer need to validate manually
+ that `m.room.member` events have a user ID as their state key!
Improvements:
