message: Add latest API additions to the changelog
diff: @@ -11,6 +11,9 @@ is based on [Keep a Changelog](https://keepachangelog.com).
  with JSON inputs directly. Actors can also pass around JSON values safely.
  - Futures can now convert to observable values for making it easier to process
  asynchronous results with data flows.
  +- Add new `*_weak` variants of `scheduled_actor::run_{delayed, scheduled}`.
  + These functions add no reference count to their actor, allowing it to become
  + unreachable if other actors no longer reference it.
  ### Fixed
  