Update changelog for v12.9.2 (#29249)

Author: danjm

CHANGELOG.md

@@ -7,6 +7,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ## [12.9.2]
+### Changed
+- Display the "Amount" row within the advanced view of contract interaction confirmations, and whenever the amount being sent differs from the "You Send" row of the transaction simulation information by more than 5% ([#29131](https://github.com/MetaMask/metamask-extension/pull/29131))
+- Improved phishing detection protections ([#28782](https://github.com/MetaMask/metamask-extension/pull/28782))
+
+### Fixed
+- Ensure that the correct fallback letter is used for network icons within the token list ([#29121](https://github.com/MetaMask/metamask-extension/pull/29121))
+- Ensure users have to click through a blocking red warning before submitting multiple Smart Transactions while one is already pending ([#29140](https://github.com/MetaMask/metamask-extension/pull/29140))
+- Prevent users from being stuck on an "Invalid string length" error screen, by deleting tokens from their state of the data was invalid because the `decimals` property of the token was `null` ([#29245](https://github.com/MetaMask/metamask-extension/pull/29245))
 
 ## [12.9.1]
 ### Changed