Add CHANGELOG entry

CHANGELOG.md

@@ -4,6 +4,17 @@
 
 💥 Breaking changes:
 
+- Make components easier to link to from error summary
+
+  Updates the radios, checkboxes and date input components so it's easier to link to their first items from the error summary component.
+
+  To migrate:
+
+  You will need to ensure that your error summary still links correctly to your first input by removing any logic that adds a suffix to your id.
+
+
+  ([PR #1426](https://github.com/alphagov/govuk-frontend/pull/1426))
+
 - Remove `govuk-focusable`, `govuk-focusable-fill` mixins, introduce `govuk-focus-text` mixin.
 
   To migrate: