Update changelog for v2.0.1

Author: thomashoneyman

CHANGELOG.md

@@ -11,7 +11,11 @@ New features:
 Bugfixes:
 
 Other improvements:
-- Fix warnings revealed by v0.14.1 PS release (#48 by @JordanMartinez)
+
+## [v2.0.1](https://github.com/purescript/purescript-ordered-collections/releases/tag/v2.0.1) - 2021-04-20
+
+Other improvements:
+- Fix warnings revealed by v0.14.1 PureScript release (#48 by @JordanMartinez)
 
 ## [v2.0.0](https://github.com/purescript/purescript-ordered-collections/releases/tag/v2.0.0) - 2021-02-26