Updated CHANGELOG.md

Author: aeon-automation

CHANGELOG.md

@@ -1,6 +1,7 @@
-## [Unreleased] - 2021-09-16
+## [Unreleased] - 2021-09-20
 
 ### Changed
+- [#70](https://github.com/amazon-php/sp-api-sdk/pull/70) - **Updated models 2021-09-20** - [@norberttech](https://github.com/norberttech)
 - [#69](https://github.com/amazon-php/sp-api-sdk/pull/69) - **Updated models 2021-09-16** - [@norberttech](https://github.com/norberttech)
 - [a2caf2](https://github.com/amazon-php/sp-api-sdk/commit/a2caf27dfacff29699ffc647b897bee7b0c09b42) - **Update README.md** - [@norberttech](https://github.com/norberttech)