Update changelog

Author: matthewwalsh0

packages/transaction-pay-controller/CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 
 - Use gas fee token for Relay deposit transactions if insufficient native balance ([#7193](https://github.com/MetaMask/core/pull/7193))
+  - Add optional `fees.isSourceGasFeeToken` property to `TransactionPayQuote` and `TransactionPayTotals` type.
 
 ## [9.0.0]