Update CHANGELOG.md

Author: robin-gdwl

CHANGELOG.md

@@ -5,24 +5,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## Unreleased 2021-02-05
-
-### Added
-* Added Blender Python-example to the documentation section: Tutorials -> Robots
-
-### Changed
-
-* Fixed bug where initialising a `compas_blender.artists.Robotmodelartist` would create a new collection for each mesh and then also not put the mesh iton the created collection. 
-* Changed the initialisation of `compas_blender.artists.Robotmodelartist` to include a `collection`-parameter instead of a `layer`-parameter to be more consistent with Blender's nomenclature. 
-* Used a utility function from `compas_blender.utilities` to create the collection if none exists instead of using a new call to a bpy-method. 
-
-### Removed
 
 ## Unreleased
 
 ### Added
 
 * Added `RobotModel.remove_link`, `RobotModel.remove_joint`, `RobotModel.to_urdf_string`, and `RobotModel.ensure_geometry`.
+* Added Blender Python-example to the documentation section: Tutorials -> Robots
 
 ### Changed
 
@@ -34,6 +23,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * Fixed bug regarding the computation of `Joint.current_origin`.
 * Fixed bug regarding a repeated call to `RobotModel.add_joint`.
 * Fixed bug in `compas.datastructures.mesh_slice_plane`.
+* Fixed bug where initialising a `compas_blender.artists.Robotmodelartist` would create a new collection for each mesh and then also not put the mesh iton the created collection. 
+* Changed the initialisation of `compas_blender.artists.Robotmodelartist` to include a `collection`-parameter instead of a `layer`-parameter to be more consistent with Blender's nomenclature. 
+* Used a utility function from `compas_blender.utilities` to create the collection if none exists instead of using a new call to a bpy-method. 
 
 ### Removed