chore: update changelog

Signed-off-by: Daniel Akhterov <[email protected]>

CHANGELOG.md

@@ -5,6 +5,17 @@ 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).
 
+## v2.9.0
+
+### Added
+
+ * `owner` field to `*Allowance` classes.
+ * `Executable.[set|get]GrpcDeadline()`
+
+### Fixed
+
+ * `AccountAllowanceAdjustTransaction` now deserializes correctly with `Transaction.fromBytes()`
+
 ## v2.9.0-beta.1
 
 ### Added