Update changelog from 2909

Author: T4rk1n

CHANGELOG.md

@@ -22,6 +22,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 - [#2922](https://github.com/plotly/dash/pull/2922) Fix background callback hash_function when source is unavailable. Fixes [#1885](https://github.com/plotly/dash/issues/1885)
 - [#2915](https://github.com/plotly/dash/pull/2915) Fix 'AttributeError' when layout is a function that returns a list of components. Fixes [#2905](https://github.com/plotly/dash/issues/2905)
 - [#2956](https://github.com/plotly/dash/pull/2956) Add missing useEffect dependency to dcc.Loading component.
+- [#2909](https://github.com/plotly/dash/pull/2909) Rehighlights dcc.Markdown when it is updated, fixes [#2895](https://github.com/plotly/dash/issues/2895)
 
 ## [2.17.1] - 2024-06-12