Update changelog.md

Author: beanieboi

changelog.md

@@ -4,7 +4,7 @@ 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
+## [1.5] - 2020-07-20
 ### Added
 - [all] move to tgz to distribute binaries
 - [all] update mime.types to reflect the version that is included in the nginx distrubition