Update CHANGELOG.md

Author: oleibman

CHANGELOG.md

@@ -27,6 +27,7 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 
 - Xlsx Reader Shared Formula with Boolean Result. Partial solution for [Issue #4280](https://github.com/PHPOffice/PhpSpreadsheet/issues/4280) [PR #4281](https://github.com/PHPOffice/PhpSpreadsheet/pull/4281)
 - Retitling cloned Worksheets. [Issue #641](https://github.com/PHPOffice/PhpSpreadsheet/issues/641) [PR #4302](https://github.com/PHPOffice/PhpSpreadsheet/pull/4302)
+- Extremely limited support for GROUPBY function. Partial response to [Issue #4282](https://github.com/PHPOffice/PhpSpreadsheet/issues/4282) [PR #4283](https://github.com/PHPOffice/PhpSpreadsheet/pull/4283)
 
 ## 2024-12-26 - 3.7.0