Update CHANGELOG.md

Author: crodriguezvega

CHANGELOG.md

@@ -34,11 +34,11 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 # Changelog
 
-## [v7.8.0]()
+## [v7.8.0](https://github.com/cosmos/ibc-go/releases/tag/v7.8.0) - 2024-08-30
 
 ### State Machine Breaking
 
-* (core/03-connection)[\#7128](https://github.com/cosmos/ibc-go/pull/7128) Remove verification of self client and consensus state from connection handshake. 
+* (core/03-connection) [\#7128](https://github.com/cosmos/ibc-go/pull/7128) Remove verification of self client and consensus state from connection handshake. 
 
 ## [v7.7.0](https://github.com/cosmos/ibc-go/releases/tag/v7.7.0) - 2024-07-29