updating changelog

Author: patkivikram

CHANGELOG.md

@@ -4,6 +4,12 @@ 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).
+##0.6.6
+### Bug Fixes
+- Error when logging slow process in aiokafka with python 3.9 [153](https://github.com/faust-streaming/faust/issues/153)
+- FIX Record instances deserialize properly when returned by agent.ask[151](https://github.com/faust-streaming/faust/issues/151)
+
+
 ##0.6.5
 ### Bug Fixes
 - Fix leader topic replication [149](https://github.com/faust-streaming/faust/issues/149)