Update changelog

Author: Stiven Masha

Diff for: CHANGELOG.md

@@ -4,6 +4,9 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## 2.1.1
+- Added Satispay logo on checkout
+
 ## 2.1.0
 - Added cron to finalize unhandled payments
 - Added support to web-app-web switch