Update CHANGELOG

CHANGELOG.md

@@ -4,6 +4,16 @@ For advice on how to use these release notes see [our guidance on staying up to
 
 ## Unreleased
 
+### Recommended changes
+
+#### Update Breadcrumbs to use `nav` and `aria-label`
+
+We've made changes to the Breadcrumbs component to improve how it appears to screen readers.
+
+We've changed the wrapping element to use the `nav` tag to expose it as a navigational landmark, and added an `aria-label` attribute to differentiate it as breadcrumb navigation.
+
+This change was introduced in [pull request #4995: Update Breadcrumb component to improve screen reader accessibility](https://github.com/alphagov/govuk-frontend/pull/4995).
+
 ## 5.4.0 (Feature release)
 
 To install this version with npm, run `npm install govuk-frontend@5.4.0`. You can also find more information about [how to stay up to date](https://frontend.design-system.service.gov.uk/staying-up-to-date/#updating-to-the-latest-version) in our documentation.