Update CHANGELOG.md

Author: LiamConnors

Diff for: CHANGELOG.md

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 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
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+## UNRELEASED
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+### Updated
+- Updated Plotly.js from version 2.24.1 to version 2.24.2. See the [plotly.js CHANGELOG](https://github.com/plotly/plotly.js/blob/master/CHANGELOG.md#2242----2023-06-09) for more information. These changes are reflected in the auto-generated `plotly.graph_objects` module.
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 ## [5.15.0] - 2023-06-08
 
 ### Updated