Update CHANGELOG.md (#343)

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.9.0] - 2024-09-10
+
 ### Added
 - `jxl-oxide-cli`: Use mimalloc (#287, #288).
 - `jxl-oxide-cli`: Add `--num-reps` (#292).
@@ -129,7 +131,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - This is the first official release of jxl-oxide, a JPEG XL decoder written in Rust.
 - Frequently used features are mostly implemented.
 
-[Unreleased]: https://github.com/tirr-c/jxl-oxide/compare/0.8.1...HEAD
+[Unreleased]: https://github.com/tirr-c/jxl-oxide/compare/0.9.0...HEAD
+[0.9.0]: https://github.com/tirr-c/jxl-oxide/releases/tag/0.9.0
 [0.8.1]: https://github.com/tirr-c/jxl-oxide/releases/tag/0.8.1
 [0.8.0]: https://github.com/tirr-c/jxl-oxide/releases/tag/0.8.0
 [0.7.2]: https://github.com/tirr-c/jxl-oxide/releases/tag/0.7.2