Update CHANGELOG.md

Author: oleibman

CHANGELOG.md

@@ -13,15 +13,15 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 
 ### Changed
 
-- Nothing yet.
+- Settings::libXmlLoaderOptions is ignored. [PR #4233](https://github.com/PHPOffice/PhpSpreadsheet/pull/4233)
 
 ### Moved
 
 - Nothing yet.
 
 ### Deprecated
 
-- Nothing yet.
+- Settings::setLibXmlLoaderOptions() and Settings::getLibXmlLoaderOptions() are no longer needed - no replacement.
 
 ### Fixed