Update CHANGELOG

CHANGELOG.md

@@ -8,6 +8,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/).
 ### Changed
 - Add support for configuring [Tessen](https://docs.sensu.io/sensu-core/1.4/reference/tessen/) via `sensu_enable_tessen` (@jaredledvina)
 - Stop publishing development/testing files to Ansible Galaxy (@jaredledvina)
+- Update molecule's testing configuration for speed and task profiling (@jaredledvina)
 
 ## [2.5.0] - 2018-06-16
 ### Changed