Update CHANGELOG.md

Author: Danny-Sundaresan

CHANGELOG.md

@@ -1,7 +1,13 @@
 # Changelog
+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
+### Added
+* Added a changelog enforcer to the workflow.
+
 ## Documentation Update <sub><sup>(February 16, 2021)</sup></sub>
 ### Changed
 * Added documentation for two <a href="https://dealerdotcom.github.io/web-integration-api-docs/#insert-locations">Insert Locations</a>.