Bumps the changelog

Author: Maël Nison

CHANGELOG.md

@@ -4,6 +4,8 @@ Please add one entry in this file for each change in Yarn's behavior. Use the sa
 
 ## Master
 
+## 1.12.1
+
 - Ensures the engine check is ran before showing the UI for `upgrade-interactive`
 
   [#6536](https://github.com/yarnpkg/yarn/pull/6536) - [**Orta Therox**](https://github.com/orta)