Update changelog.

Author: T4rk1n

CHANGELOG.md

@@ -4,8 +4,13 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 
 ## [UNRELEASED]
 
-### Added
+## Added
 - [#2695](https://github.com/plotly/dash/pull/2695) Adds  `triggered_id` to `dash_clientside.callback_context`.  Fixes [#2692](https://github.com/plotly/dash/issues/2692)
+- [#2732](https://github.com/plotly/dash/pull/2732) Add special key `_dash_error` to `setProps`, allowing component developers to send error without throwing in render. Usage `props.setProps({_dash_error: new Error("custom error")})`
+
+## Fixed
+
+- [#2732](https://github.com/plotly/dash/pull/2732) Sanitize html props that are vulnerable to xss vulnerability if user data is inserted. Fix Validate url to prevent XSS attacks [#2729](https://github.com/plotly/dash/issues/2729)
 
 ## Changed
 - [#2652](https://github.com/plotly/dash/pull/2652) dcc.Clipboard supports htm_content and triggers a copy to clipboard when n_clicks are changed