update changelog v0.2.1 (#396)

* update changelog v0.2.1

* updating the release date

* add #238

Co-authored-by: Giancarlo Castro <giancastrok@gmail.com>

Co-authored-by: marco <marco@makepath.com>
Co-authored-by: Giancarlo Castro <giancastrok@gmail.com>

Author: 3 people

CHANGELOG.md

@@ -1,6 +1,14 @@
 ## Xarray-Spatial Changelog
 -----------
 
+### Version 0.2.1 - 5/5/2021
+- Added GPU and Dask support for Focal tools: mean, apply, hotspots (#238) 
+- Moved kernel creation functions to convolution module (#238) 
+- Update Code of Conduct (#391)
+- Fixed manhattan distance to sum of abs (#309)
+- Example notebooks running on PC Jupyter Hub (#370)
+- Fixed examples download cli cmd (#349)
+
 ### Version 0.2.0 - 4/28/2021
 - Test release for new github actions