Update CHANGELOG.md

CHANGELOG.md

@@ -10,10 +10,10 @@ 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).
 
-## [Unrelease]
+## [0.4.0]
 ### Added
 - Expose metrics in prometheus text-based format
-- Add default value for core config and cluster config
+- Add default value for core configs to reduce configuration cost
 - Add mod_static to serve static content by customize rules
 - Documents optimization
 
@@ -58,7 +58,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Flexible plugin framework to extend functionality. Based on the framework, developer can add new features rapidly
 - Detailed built-in metrics available for service status monitor
 
-[Unrelease]: https://github.com/baidu/bfe/compare/v0.3.0...HEAD
+[v0.4.0]: https://github.com/baidu/bfe/compare/v0.3.0...v0.4.0
 [v0.3.0]: https://github.com/baidu/bfe/compare/v0.2.0...v0.3.0
 [v0.2.0]: https://github.com/baidu/bfe/compare/v0.1.0...v0.2.0
 [v0.1.0]: https://github.com/baidu/bfe/releases/tag/v0.1.0

VERSION

@@ -1 +1 @@
-0.4.0-dev
+0.4.0