Updated CHANGELOG.md

Author: aeon-automation

CHANGELOG.md

@@ -1,3 +1,9 @@
+## [Unreleased] - 2025-06-19
+
+### Changed
+- [#753](https://github.com/amazon-php/sp-api-sdk/pull/753) - **Update GitHub test-suite to use Ubuntu-22.04** - [@jasonhebert](https://github.com/jasonhebert)
+- [#753](https://github.com/amazon-php/sp-api-sdk/pull/753) - **Make implicitly null param explicitly null in LoggerConfiguration** - [@jasonhebert](https://github.com/jasonhebert)
+
 ## [7.1.0] - 2025-02-28
 
 ### Added