update changelog

Signed-off-by: Luke-zhang-04 <[email protected]>

Author: Luke-zhang-04

CHANGELOG.md

@@ -4,6 +4,13 @@ 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).
 
+## [2.0.1] - 2021-03-01
+
+Only some changes to README and CI
+
+### Changed
+- made the run button a lighter green
+
 ## [2.0.0] - 2021-03-01
 
 ### Added