Fix changelog.

Author: zservies

changelog.md

@@ -3,7 +3,7 @@ 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).
 
-# [Unreleased](https://github.com/MyPureCloud/genesys-cloud-webrtc-sdk/compare/v12.0.0...HEAD)
+# [Unreleased](https://github.com/MyPureCloud/genesys-cloud-webrtc-sdk/compare/v12.1.0...HEAD)
 
 # [v12.1.0](https://github.com/MyPureCloud/genesys-cloud-webrtc-sdk/compare/v12.0.0...v12.1.0)
 ### Added