Document in CHANGELOG

Author: 36degrees

CHANGELOG.md

@@ -4,6 +4,12 @@ For advice on how to use these release notes see [our guidance on staying up to
 
 ## Unreleased
 
+### Fixes
+
+We've made fixes to GOV.UK Frontend in the following pull requests:
+
+- [#6338: Fix hover state on focused small radios](https://github.com/alphagov/govuk-frontend/pull/6338)
+
 ## v5.13.0 (Feature release)
 
 ### New features