Update CHANGELOG.md

Author: mackysoft

Documentation/changelog/CHANGELOG.md

@@ -5,6 +5,11 @@ 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).
 
+## [1.2.1] - 2021-04-25
+### Changed
+- Renamed from `VisionSettingsInitializer` to `VisionSettingsGenerator`.
+- Implemented the `VISION_DISABLE_GENERATE_SETTINGS` definition symbol again to avoid the `Resources` folder being included in the OpwnUPM package.
+
 ## [1.2.0] - 2021-04-25
 ### Added
 - Added `CullingTargetComponents` and `CullingTargetGameObjects`.