adding ### Fixed header for #38

Author: majormoses

CHANGELOG.md

@@ -4,6 +4,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 This CHANGELOG follows the format listed [here](https://github.com/sensu-plugins/community/blob/master/HOW_WE_CHANGELOG.md).
 
 ## [Unreleased]
+### Fixed
 - `check-ssl-hsts-preloadable.rb`: Fixed testing warnings for if a domain can be HSTS preloaded (@rwky)
 
 ## [1.5.0] - 2017-09-26