Update version in changelog draft (#150)

Author: gopinath-langote

docs/CHANGELOG.md

@@ -5,7 +5,7 @@ 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).
 
 ---
-## [v2.0.0](https://github.com/gopinath-langote/1build/milestone/8) [DRAFT]
+## [v1.4.0](https://github.com/gopinath-langote/1build/milestone/8) [DRAFT]
 ### Added
 
 ### Changed