Update changelog

Author: camdecoster

CHANGELOG.md

@@ -4,6 +4,10 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## Unreleased
 
+### Fixed
+- Update `numpy.percentile` syntax to stop using deprecated alias [[5483](https://github.com/plotly/plotly.py/pull/5483)], with thanks to @Mr-Neutr0n for the contribution!
+  - `numpy` with a version less than 1.22 is no longer supported.
+
 ## [6.6.0] - 2026-03-02
 
 ### Fixed