message: Fix merge of CHANGELOG.md
diff: ### Fixed
  * <How do the end-user experience this issue? what was the impact?> ([#????](https://github.com/realm/realm-core/issues/????), since v?.?.?)
  -* None.
  +* "find first" on Decimal128 field with value NaN does not find objects ([6182](https://github.com/realm/realm-core/issues/6182), since v6.0.0)
  ### Breaking changes
  -* None.
  +* Passing an empty `key_path_array` to `add_notification_callback now` now ignores nested property changes. Pass `std::nullopt` to achieve the old meaning. ([#6122](https://github.com/realm/realm-core/pull/6122))
  ### Compatibility
  * Fileformat: Generates files with format v23. Reads and automatically upgrade from fileformat v5.
  * Fixed possible segfault in sync client where async callback was using object after being deallocated ([#6053](https://github.com/realm/realm-core/issues/6053), since v11.7.0)
  * Fixed crash when using client reset with recovery and flexible sync with a single subscription ([#6070](https://github.com/realm/realm-core/issues/6070), since v12.3.0)
  * Fixed crash with wrong transaction state, during realm migration if realm is frozen due to schema mismatch ([#6144](https://github.com/realm/realm-core/issues/6144), since v13.0.0)
  -* "find first" on Decimal128 field with value NaN does not find objects ([6182](https://github.com/realm/realm-core/issues/6182), since v6.0.0)
  ### Breaking changes
  * Core no longer provides any vcpkg infrastructure (the ports submodule and overlay triplets), because it handles dependant libraries internally now.
  * Freelist may be corrupted if compaction was initiated ([#6054](https://github.com/realm/realm-core/pull/6054), since v13.0.0)
  ### Breaking changes
  -* Passing an empty `key_path_array` to `add_notification_callback now` now ignores nested property changes. Pass `std::nullopt` to achieve the old meaning. ([#6122](https://github.com/realm/realm-core/pull/6122))
  * Updated `logger_factory` in SyncClientConfig to return a `shared_ptr` instead of a `unique_ptr` ([PR #5980](https://github.com/realm/realm-core/pull/5980))
  * `util::RootLogger` has been replaced with `util::Logger`
  