chore: Fix CHANGELOG.md version header

Author: coreyfarrell

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
 
-### [15.0.1](https://github.com/istanbuljs/nyc/compare/v15.0.0...v15.0.1) (2020-04-02)
+## [15.0.1](https://github.com/istanbuljs/nyc/compare/v15.0.0...v15.0.1) (2020-04-02)
 
 
 ### Bug Fixes