Update CHANGELOG

Author: razor-x

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](https://semver.org/).
 
+## 1.2.1 / 2022-01-24
+
+### Changed
+
+- Config file name in zip from `config.yaml` to `benthos.yaml`.
+
 ## 1.2.0 / 2021-09-09
 
 ### Added