Update changelog

Author: matthewwalsh0

packages/transaction-controller/CHANGELOG.md

@@ -9,6 +9,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- Update transaction timeout to check time since submission or when transaction was last seen on network ([#7464](https://github.com/MetaMask/core/pull/7464))
+  - Uses `blockTime` from `acceleratedPolling` feature flag.
 - Bump `@metamask/remote-feature-flag-controller` from `^3.0.0` to `^3.1.0` ([#7519](https://github.com/MetaMask/core/pull/7519))
 
 ### Fixed