message: Again undo merge of Changelog
diff: * Changed the signature of `Realm::async_cancel_transaction` to return a boolean indicating whether the removal of the scheduled callback was successful (true) or not (false). Previously, the method returned void. (PR [#5546](https://github.com/realm/realm-core/pull/5546))
  ### Breaking changes
  -* None.
  +* `realm::Realm::Config` has been renamed to `realm::RealmConfig`.
  ### Compatibility
  * Fileformat: Generates files with format v22. Reads and automatically upgrade from fileformat v5.
  