Update CHANGELOG.md (#271)

* Update CHANGELOG.md

* f

---------

Co-authored-by: Ohad Bitton <ohbitton@microsoft.com>

CHANGELOG.md

@@ -5,9 +5,17 @@ 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).
 
-## Not released
+## [5.2.1] - 2023-08-22
+
+### Fixed
 
 -   Avoid node headers in browser (Accept-Encoding, Connection)
+-   Remove dependency on crypto browserify
+
+### Added
+
+-   sample app for browser auth and run from react vite
+-   Export from index.ts more classes that are exposed to user
 
 ## [5.2.0] - 2023-07-18