Update CHANGELOG.md

Author: jescalada

CHANGELOG.md

@@ -2,6 +2,11 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## Unreleased
+
+### Fixed
+- Fix third-party widget display issues in v6 [[#5102]https://github.com/plotly/plotly.py/pull/5102]
+
 ## [6.0.1] - 2025-03-14
 
 ### Updated