update changelog

CHANGELOG.md

@@ -9,6 +9,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Separate config settings for mturk qualifications for `live` and `sandbox` modes (#505)
 - Added configuration option for changing autogenerated dashboard-related tables to be unique per experiment -- for use when a single database is shared across multiple experiments (#495)
 
+### Updated
+- Facelift for dashboard
+
 ### Fixed
 - Fix backwards-compat bug for assignments-table (#528) -- Thanks @jacob-lee!