update CHANGELOG.md

Author: wphan

CHANGELOG.md

@@ -19,6 +19,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - program: add titan to whitelisted swap programs ([#1952](https://github.com/drift-labs/protocol-v2/pull/1952))
 - program: allow hot wallet to increase max spread and pause funding ([#1957](https://github.com/drift-labs/protocol-v2/pull/1957))
+- program: use-5min-for-target-expiry-price  ([#1967](https://github.com/drift-labs/protocol-v2/pull/1967))
 
 ### Fixes