update changelog

CHANGELOG.md

@@ -17,7 +17,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - ClamAV antivirus integration (<https://github.com/opencv/cvat/pull/1712>)
 - Supported import and export or single boxes in MOT format (https://github.com/opencv/cvat/pull/1764)
 - [Datumaro] Added `stats` command, which shows some dataset statistics like image mean and std (https://github.com/opencv/cvat/pull/1734)
-- Add option to upload annotations upon task creation on CLI 
+- Add option to upload annotations upon task creation on CLI
 - Polygon and polylines interpolation (<https://github.com/opencv/cvat/pull/1571>)
 - Ability to redraw shape from scratch (Shift + N) for an activated shape (<https://github.com/opencv/cvat/pull/1571>)
 - Highlights for the first point of a polygon/polyline and direction (<https://github.com/opencv/cvat/pull/1571>)
@@ -29,6 +29,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Update https install manual. Makes it easier and more robust. Includes automatic renewing of lets encrypt certificates.
 - Implemented import and export of annotations with relative image paths (<https://github.com/opencv/cvat/pull/1463>)
 - Using only single click to start editing or remove a point (<https://github.com/opencv/cvat/pull/1571>)
+- Added annotation attributes in COCO format (https://github.com/opencv/cvat/pull/1782)
 
 ### Deprecated
 -