Update CHANGELOG.md

Author: gmfeinberg

CHANGELOG.md

@@ -3,8 +3,7 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](http://keepachangelog.com/).
 
-## 5.2.0 - 2020-04-06
+## 1.2.0 - 2020-04-09
 This is the initial release of the Go SDK for the Oracle NoSQL Database.
 It supports both the on-premise product and the Oracle NoSQL
-Database Cloud Service. It is starting at version 5.2 for consistency with
-the other language SDKs that support both environments.
+Database Cloud Service.