Update CHANGELOG.md

Author: Xon

CHANGELOG.md

@@ -2,8 +2,12 @@
 
 ## [11.0.0]
 
+### ⚠ BREAKING CHANGES
+* Update polyfills to include `Element.prototype.replaceChildren`
+
 ### Bug Fixes (from 10.2.0)
 * Reduce work done for `unhighlightAll` during on-click handler (batching in v11.0.0-rc8 would also have helped) [#522](https://github.com/Choices-js/Choices/issues/522) [#599](https://github.com/Choices-js/Choices/issues/599)
+* Improve performance when rendering very large number of items and choices. Stuttering when stopping searching or selecting an item still happens depending on device and number of choices.
 
 ## [11.0.0-rc8] (2024-08-23)