update changelog

CHANGELOG.md

@@ -38,14 +38,23 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Dependencies
 
+* [\#4122](https://github.com/cosmos/ibc-go/pull/4122) Update Cosmos SDK to v0.47.4.
+
 ### API Breaking
 
 ### State Machine Breaking
 
 ### Improvements
 
+* [\#4187](https://github.com/cosmos/ibc-go/pull/4187) Adds function 'WithICS4Wrapper' to keepers to allow to set the middleware after the keeper's creation.
+
 ### Features
 
+* [\#3796](https://github.com/cosmos/ibc-go/pull/3796) Adds support for json tx encoding for interchain accounts.
+* [\#4188](https://github.com/cosmos/ibc-go/pull/4188) Adds optional `PacketDataUnmarshaler` interface that allows a middleware to request the packet data to be unmarshaled by the base application.
+* [\#4199](https://github.com/cosmos/ibc-go/pull/4199) Adds optional `PacketDataProvider` interface for retrieving custom packet data stored on behalf of another application.
+* [\#4200](https://github.com/cosmos/ibc-go/pull/4200) Adds optional `PacketData` interface which application's packet data may implement.
+
 ### Bug Fixes
 
 ## [v7.2.0](https://github.com/cosmos/ibc-go/releases/tag/v7.2.0) - 2023-06-22