Update CHANGELOG.md for version 5.6.16

Author: arhtudormorar

CHANGELOG.md

@@ -7,7 +7,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
-## [[5.6.15](https://github.com/multiversx/mx-sdk-dapp/pull/1723)] - 2026-02-12
+## [[5.6.16](https://github.com/multiversx/mx-sdk-dapp/pull/1723)] - 2026-02-12
 
 - [Update sdk-dapp-ui](https://github.com/multiversx/mx-sdk-dapp/pull/1723)