update changelog

CHANGELOG.md

@@ -5,6 +5,21 @@ All notable changes for the packages in the airo-mono repo are documented here.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 This project uses a [CalVer](https://calver.org/) versioning scheme with monthly releases, see [here](versioning.md)
 
+## Unreleased
+
+### Breaking changes
+ - internal dependencies are now listed as regular dependencies in the `setup.py` file to overcome issues and make the installation process less complicated. This implies you need to install packages according to their dependencies and can no longer use the `external` tag as in `pip install airo-typing[external]`.
+ see [issue #91](https://github.com/airo-ugent/airo-mono/issues/91) and
+ [PR](https://github.com/airo-ugent/airo-mono/pull/108) for more details.
+
+### Added
+
+### Changed
+
+### Fixed
+
+### Removed
+
 ## 2024.1.0
 
 ### Breaking changes