Fix CHANGELOG (#366)

Author: ruedap

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](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
-## [7.0.4](https://github.com/styled-components/jest-styled-components/compare/v7.0.2...v7.0.3) - 2020-08-19
+## [7.0.4](https://github.com/styled-components/jest-styled-components/compare/v7.0.3...v7.0.4) - 2021-04-18
 
 - support styled-components v6