chore: add Tempo-releated changes to CHANGELOG

Author: maxime-oe

CHANGELOG.md

@@ -5,6 +5,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+
+### Added
+- Tempo Transaction testing panel (ERC20 batch send with fee token). ([#427](https://github.com/MetaMask/test-dapp/pull/427), [#429](https://github.com/MetaMask/test-dapp/pull/429), [#430](https://github.com/MetaMask/test-dapp/pull/430))
+
 ## [9.8.0]
 ### Added
 - Add a new Send Calls - Required Assets button to the EIP-5792 send calls section ([#423](https://github.com/MetaMask/test-dapp/pull/423))