Build(deps): Bump govuk-frontend and @types/govuk-frontend

Bumps [govuk-frontend](https://github.com/alphagov/govuk-frontend) and [@types/govuk-frontend](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/govuk-frontend). These dependencies needed to be updated together.

Updates `govuk-frontend` from 5.7.1 to 5.11.0
- [Release notes](https://github.com/alphagov/govuk-frontend/releases)
- [Changelog](https://github.com/alphagov/govuk-frontend/blob/main/CHANGELOG.md)
- [Commits](alphagov/govuk-frontend@v5.7.1...v5.11.0)

Updates `@types/govuk-frontend` from 5.7.0 to 5.9.0
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/govuk-frontend)

---
updated-dependencies:
- dependency-name: govuk-frontend
  dependency-version: 5.11.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: "@types/govuk-frontend"
  dependency-version: 5.9.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

designer/package.json

@@ -53,7 +53,7 @@
     "@hapi/wreck": "^18.1.0",
     "@hapi/yar": "^11.0.2",
     "@types/dagre": "^0.7.52",
-    "@types/govuk-frontend": "^5.7.0",
+    "@types/govuk-frontend": "^5.9.0",
     "@types/hapi__cookie": "^12.0.5",
     "@types/hapi__crumb": "^7.3.7",
     "@types/hapi__inert": "^5.2.10",
@@ -76,7 +76,7 @@
     "date-fns": "^4.1.0",
     "depth-first": "^4.0.0",
     "focus-trap-react": "^11.0.3",
-    "govuk-frontend": "^5.7.1",
+    "govuk-frontend": "^5.11.0",
     "hapi-pino": "^12.1.0",
     "http-status-codes": "^2.3.0",
     "i18next": "^24.2.3",