add 0.4.2 changelog

helmchart/single-sign-on/CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this helm chart 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).
 
+## [0.4.2] - 2021-11-18
+
+- Changed postgresql persistence defaults and remove PVC from this chart
+
 ## [0.4.1] - 2021-11-15
 
 - Added stateful database store for Hydra