Upgrade to business class (v5.4.0)

Author: keithduncan

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](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
-## [v5.3.3](https://github.com/buildkite/elastic-ci-stack-for-aws/compare/v5.3.2...v5.3.3) (2021-06-30)
+## [v5.4.0](https://github.com/buildkite/elastic-ci-stack-for-aws/compare/v5.3.2...v5.4.0) (2021-06-30)
 
 ### Added