Update CHANGELOG.md

Co-authored-by: Kabilar Gunalan <kabilar@datajoint.com>

Author: sidhulyalkar

CHANGELOG.md

@@ -3,13 +3,10 @@
 Observes [Semantic Versioning](https://semver.org/spec/v2.0.0.html) standard and 
 [Keep a Changelog](https://keepachangelog.com/en/1.0.0/) convention.
 
-## [0.2.2] - 2022-12-16
+## [0.2.1] - 2022-12-16
 
 + Update - Requirements to accomodate DLC package requirements changing
 + Fix - Typos in docstrings
-
-## [0.2.1] - Unreleased
-
 + Update - Docstrings for mkdocs deployment
 + Update - Doc website styling including logos, navigation, social icons
 + Add - Flow diagram in svg and drawio formats