update changelog

Author: LucaMarconato

CHANGELOG.md

@@ -8,9 +8,15 @@ and this project adheres to [Semantic Versioning][].
 [keep a changelog]: https://keepachangelog.com/en/1.0.0/
 [semantic versioning]: https://semver.org/spec/v2.0.0.html
 
+## incoming version
+
+### Fixed
+
+-   Fix bug due to `sc.get.obs_df()` returning a different type (#393)
+
 ## [0.2.8] - 2024-11-26
 
-- Support for `xarray.DataTree` (which moved from `datatree.DataTree`) 
+-   Support for `xarray.DataTree` (which moved from `datatree.DataTree`)
 
 ## [0.2.7] - 2024-10-24