Add changelog for 0.9.0

Author: kezhuw

CHANGELOG.md

@@ -5,6 +5,14 @@ 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).
 
+## [0.9.0] = 2024-10-16
+### Added
+- **Breaking:** support multiple async runtimes but not only tokio ([#52](https://github.com/kezhuw/zookeeper-client-rust/pull/52)[#53](https://github.com/kezhuw/zookeeper-client-rust/pull/53))
+
+### Changed
+- Upgrade rsasl to 2.2.0 to fix unexported types ([#54](https://github.com/kezhuw/zookeeper-client-rust/pull/54))
+- Split connection to reader and writer to multiplex them ([#51](https://github.com/kezhuw/zookeeper-client-rust/pull/51))
+
 ## [0.8.1] - 2024-10-16
 ### Changed
 - Upgrade rsasl to 2.2.0 to fix unexported types ([#54](https://github.com/kezhuw/zookeeper-client-rust/pull/54))