Bump govuk-frontend from 5.3.1 to 5.4.0

Bumps [govuk-frontend](https://github.com/alphagov/govuk-frontend) from 5.3.1 to 5.4.0.
- [Release notes](https://github.com/alphagov/govuk-frontend/releases)
- [Changelog](https://github.com/alphagov/govuk-frontend/blob/main/CHANGELOG.md)
- [Commits](alphagov/govuk-frontend@v5.3.1...v5.4.0)

---
updated-dependencies:
- dependency-name: govuk-frontend
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -6,7 +6,7 @@
     "dfe-autocomplete": "github:DFE-Digital/dfe-autocomplete",
     "esbuild": "^0.21.3",
     "govuk-country-and-territory-autocomplete": "^1.0.2",
-    "govuk-frontend": "^5.3.1",
+    "govuk-frontend": "^5.4.0",
     "sass": "^1.77.2"
   },
   "scripts": {

yarn.lock

@@ -247,10 +247,10 @@ govuk-country-and-territory-autocomplete@^1.0.2:
     core-js "3.2.1"
     openregister-picker-engine "^1.2.1"
 
-govuk-frontend@^5.0.0, govuk-frontend@^5.3.1:
-  version "5.3.1"
-  resolved "https://registry.yarnpkg.com/govuk-frontend/-/govuk-frontend-5.3.1.tgz#d63e2078b0d94a119bfe322431218f04024668a2"
-  integrity sha512-EzegdVdmZVwXUGTQTsBgK4TkMpMyPdOIa2g1kvwX7EeyP9Kah+amXSo97gbiI8N49L6E0J6/2H6qLW4QN3KhMQ==
+govuk-frontend@^5.0.0, govuk-frontend@^5.4.0:
+  version "5.4.0"
+  resolved "https://registry.yarnpkg.com/govuk-frontend/-/govuk-frontend-5.4.0.tgz#8f2e0b55ef7c7552a1efe68c7b40ff1b4a393e72"
+  integrity sha512-F3YwQYrYQqIPfNxsoph6O78Ey1unCB6cy6omx8KeWY9G504lWZFBSIaiUCma1jNLw9bOUU7Ui+tXG09jjqy0Mw==
 
 immutable@^4.0.0:
   version "4.3.5"