Update CHANGELOG.md

Author: DmitryTsepelev

CHANGELOG.md

@@ -8,6 +8,7 @@
 
 - [PR #218](https://github.com/DmitryTsepelev/store_model/pull/218) Handle hash types on parent assignment ([@MatheusRich])
 - [PR #219](https://github.com/DmitryTsepelev/store_model/pull/219) Add nested errors object as error's options/details ([@zverok])
+- [PR #220](https://github.com/DmitryTsepelev/store_model/pull/220) Support ActiveModel 8.1+ normalization API ([@ixti])
 
 ## 4.3.0 (2025-07-26)
 
@@ -279,3 +280,4 @@
 [@dmitrytrager]: https://github.com/dmitrytrager
 [@MatheusRich]: https://github.com/MatheusRich
 [@zverok]: https://github.com/zverok
+[@ixti]: https://github.com/ixti