Add CHANGELOG

Author: marthacryan

CHANGELOG.md

@@ -2,6 +2,11 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## UNRELEASED
+
+### Updated
+- Fixed a bug in integer validation of arrays that threw an error when an array contained a mix of strings and integers.
+
 ## [5.23.0] - 2024-07-23
 
 ### Updated