Update CHANGELOG.md

Author: sunli829

CHANGELOG.md

@@ -4,6 +4,13 @@ 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).
 
+# [4.0.4] 2022-6-25
+
+- Bump Actix-web from `4.0.1` to `4.1.0`
+- Add a `prefer_single_line_descriptions` option on `SDLExportOptions` [#955](https://github.com/async-graphql/async-graphql/pull/955)
+- Fixes [#957](https://github.com/async-graphql/async-graphql/issues/957)
+- Fixes [#943](https://github.com/async-graphql/async-graphql/issues/943)
+
 # [4.0.3] 2022-6-20
 
 - Custom error type in axum request extractor [#945](https://github.com/async-graphql/async-graphql/pull/945)