Update CHANGELOG.md

Author: DavidXanatos

CHANGELOG.md

@@ -2,7 +2,7 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
-## [1.6.4] - 2025-05-03
+## [1.6.4] - 2025-05-04
 
 ### Fixed
 - fixed failure to update dyndata