CHANGELOG: add description for patch 1272

Author: dannywillems

CHANGELOG.md

@@ -87,6 +87,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ([#1230](https://github.com/o1-labs/openmina/pull/1230))
 - bump itertools from 0.10.5 to 0.12.0 #1228
   ([#1228](https://github.com/o1-labs/openmina/pull/1228))
+- bump aes from 0.8.3 to 0.8.4
+  ([#1272](https://github.com/o1-labs/openmina/pull/1272))
 
 ### Other