update changelog before v8.2.1

Author: crodriguezvega

CHANGELOG.md

@@ -34,23 +34,16 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 # Changelog
 
-## [[Unreleased]]
-
-### Dependencies
-
-### API Breaking
-
-### State Machine Breaking
+## [v8.2.1](https://github.com/cosmos/ibc-go/releases/tag/v8.2.1) - 2024-04-25
 
 ### Improvements
 
 * (apps/27-interchain-accounts) [\#6142](https://github.com/cosmos/ibc-go/pull/6142) Emit an event signalling that the host submodule is disabled.
 
-### Features
-
 ### Bug Fixes
 
 * [\#5837](https://github.com/cosmos/ibc-go/pull/5837) Move 02-client legacy v1beta gov types deprecation message to constructor functions.
+* (apps/transfer) [\#5497](https://github.com/cosmos/ibc-go/pull/5497) Fix text in log of the migration that sets the total amount of source chain tokens in escrow.
 
 ## [v8.2.0](https://github.com/cosmos/ibc-go/releases/tag/v8.2.0) - 2024-04-05