Update changelog for 4.3.1 (#2987)

Author: GromNaN

Diff for: CHANGELOG.md

@@ -1,7 +1,7 @@
 # Changelog
 All notable changes to this project will be documented in this file.
 
-## [4.3.1]
+## [4.3.1] - 2024-05-31
 
 * Fix memory leak when filling nested fields using dot notation by @GromNaN in [#2962](https://github.com/mongodb/laravel-mongodb/pull/2962)
 * Fix PHP error when accessing the connection after disconnect by @SanderMuller in [#2967](https://github.com/mongodb/laravel-mongodb/pull/2967)