update changelog

Author: emilykl

CHANGELOG.md

@@ -12,6 +12,13 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 - Fix `mpl_to_plotly` not setting `paper_bgcolor` and `plot_bgcolor` from the matplotlib figure and axes backgrounds, so converted figures match the source figure's background colors [[#5285](https://github.com/plotly/plotly.py/pull/5285)], with thanks to @robertoffmoura for the contribution!
 - Fix rendering issue causing a too-large div when calling `Figure.show()` in Google Colab [[#5718](https://github.com/plotly/plotly.py/pull/5718)]
 
+### Updated
+- Update plotly.js from version 4.0.0 to version 4.1.0 [[#5722](https://github.com/plotly/plotly.py/pull/5722)]. See the [plotly.js release notes](https://github.com/plotly/plotly.js/releases/tag/v4.1.0) for details. Notable changes include:
+  - Add an opt-in modebar button for downloading Plotly figures as JSON [[#7990](https://github.com/plotly/plotly.js/pull/7990), [#8022](https://github.com/plotly/plotly.js/pull/8022)]
+  - Add `legend.groupdoubleclick` to set the group behavior for a legend double-click [[#7997](https://github.com/plotly/plotly.js/pull/7997)]
+  - Increase default double-click delay threshold to 500ms (from 300) [[#8014](https://github.com/plotly/plotly.js/pull/8014)]
+  - Fix issue with per-point marker color for hover labels in `scattergl`, `quiver` traces [[#8027](https://github.com/plotly/plotly.js/pull/8027)]
+
 ## [7.0.0] - 2026-08-25
 
 ### Fixed