Update changelog.

Author: T4rk1n

CHANGELOG.md

@@ -10,7 +10,8 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 - [#3011](https://github.com/plotly/dash/pull/3011) Fixed an exception error caused by assigning `None` to array properties with `exact` or `shape` element types. Fixes [#3010](https://github.com/plotly/dash/issues/3010)
 - [#2991](https://github.com/plotly/dash/pull/2991) Add support for URL decoding of the search parameter for pages.
 - [#3025](https://github.com/plotly/dash/pull/3025) Fix no output callback with error handler setting the response to NoUpdate and triggering an error.
-- [#3034](https://github.com/plotly/dash/pull/3034) Remove whitespace from `metadata.json` files to reduce package size
+- [#3034](https://github.com/plotly/dash/pull/3034) Remove whitespace from `metadata.json` files to reduce package size.
+- [#3009](https://github.com/plotly/dash/pull/3009) Performance improvement on (pattern-matching) callbacks.
 
 ## [2.18.1] - 2024-09-12