Fix date

Author: tburrows13

CHANGELOG.md

@@ -5,7 +5,7 @@ All notable changes to this project will be documented in this file.
 The format from v2.0.0 onwards 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.dev1](https://github.com/zulko/moviepy/tree/v2.0.0.dev1) (2020-05-07)
+## [v2.0.0.dev1](https://github.com/zulko/moviepy/tree/v2.0.0.dev1) (2020-06-04)
 
 [Full Changelog](https://github.com/zulko/moviepy/compare/v1.0.2...v2.0.0.dev1)