Update CHANGELOG.md

Author: oleibman

CHANGELOG.md

@@ -46,6 +46,7 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 - Default Value for Conditional::$text [PR #3946](https://github.com/PHPOffice/PhpSpreadsheet/pull/3946)
 - Table Filter Buttons [Issue #3988](https://github.com/PHPOffice/PhpSpreadsheet/issues/3988) [PR #3992](https://github.com/PHPOffice/PhpSpreadsheet/pull/3992)
 - Improvements to Xml Reader [Issue #3999](https://github.com/PHPOffice/PhpSpreadsheet/issues/3999) [Issue #4000](https://github.com/PHPOffice/PhpSpreadsheet/issues/4000) [Issue #4001](https://github.com/PHPOffice/PhpSpreadsheet/issues/4001) [Issue #4002](https://github.com/PHPOffice/PhpSpreadsheet/issues/4002) [PR #4003](https://github.com/PHPOffice/PhpSpreadsheet/pull/4003) [PR #4007](https://github.com/PHPOffice/PhpSpreadsheet/pull/4007)
+- Html Reader non-UTF8 [Issue #3995](https://github.com/PHPOffice/PhpSpreadsheet/issues/3995) [Issue #866](https://github.com/PHPOffice/PhpSpreadsheet/issues/866) [Issue #1681](https://github.com/PHPOffice/PhpSpreadsheet/issues/1681) [PR #4019](https://github.com/PHPOffice/PhpSpreadsheet/pull/4019)
 
 ## 2.0.0 - 2024-01-04