Add missing information into changelog.

CHANGELOG.md

@@ -4,24 +4,16 @@ 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).
 
-## [1.0.0-alpha] - Unreleased
+## [1.0.0-alpha] - 2020-03-31
 ### Added
--
+- Data streaming using chunks (https://github.com/opencv/cvat/pull/1007)
-
+- New UI: showing file names in UI (https://github.com/opencv/cvat/pull/1311)
-### Changed
+- New UI: delete a point from context menu (https://github.com/opencv/cvat/pull/1292)
--
-
-### Deprecated
--
-
-### Removed
--
 
 ### Fixed
--
+- Git app cannot clone a repository (https://github.com/opencv/cvat/pull/1330)
-
+- New UI: preview position in task details (https://github.com/opencv/cvat/pull/1312)
-### Security
+- AWS deployment (https://github.com/opencv/cvat/pull/1316)
--
 
 ## [0.6.1] - 2020-03-21
 ### Changed