(doc) reformat changelog

sunng87 · sunng87 · commit 1040a276b0fd · 2020-10-20T22:06:03.000+08:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -5,7 +5,7 @@ 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]
+## [0.5.0] - 2020-10-20
 
 ### Changed
 
