Update changelog for horizon client and txnbuild 7.1.1 release

clients/horizonclient/CHANGELOG.md

@@ -3,11 +3,12 @@
 All notable changes to this project will be documented in this
 file.  This project adheres to [Semantic Versioning](http://semver.org/).
 
-## Unreleased
+## [v7.1.1](https://github.com/stellar/go/releases/tag/horizonclient-v7.1.1) - 2021-06-25
 
 * Added transaction and operation result codes to the horizonclient.Error string for easy glancing at string only errors for underlying cause.
 * Fix bug in the transaction submission where requests with large transaction payloads fail with an HTTP 414 URI Too Long error ([#3643](https://github.com/stellar/go/pull/3643)).
 * Fix a data race in `Client.fixHorizonURL`([#3690](https://github.com/stellar/go/pull/3690)).
+* Fix bug which occurs when parsing operations involving muxed accounts ([#3722](https://github.com/stellar/go/pull/3722)).
 
 ## [v7.0.0](https://github.com/stellar/go/releases/tag/horizonclient-v7.0.0) - 2021-05-15
 

txnbuild/CHANGELOG.md

@@ -6,10 +6,12 @@ file.  This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## Unreleased
 
-### Bug Fix
+## [v7.1.1](https://github.com/stellar/go/releases/tag/horizonclient-v7.1.1) - 2021-06-25
 
-* Claimable balance IDs are now precomputed correctly (`Transaction.ClaimableBalanceID(int)`) even when the transaction's source account is a fully-muxed account ([#3678](https://github.com/stellar/go/pull/3678)).
+### Bug Fixes
 
+* Claimable balance IDs are now precomputed correctly (`Transaction.ClaimableBalanceID(int)`) even when the transaction's source account is a fully-muxed account ([#3678](https://github.com/stellar/go/pull/3678)).
+* Fix muxed account address parsing for account merge operation ([#3722](https://github.com/stellar/go/pull/3722)).
 
 ## [v7.1.0](https://github.com/stellar/go/releases/tag/horizonclient-v7.1.0) - 2021-06-01