Bump govuk-frontend from 5.14.0 to 6.0.0

Bumps [govuk-frontend](https://github.com/alphagov/govuk-frontend/tree/HEAD/packages/govuk-frontend) from 5.14.0 to 6.0.0.
- [Release notes](https://github.com/alphagov/govuk-frontend/releases)
- [Changelog](https://github.com/alphagov/govuk-frontend/blob/main/CHANGELOG.md)
- [Commits](https://github.com/alphagov/govuk-frontend/commits/v6.0.0/packages/govuk-frontend)

---
updated-dependencies:
- dependency-name: govuk-frontend
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -36,7 +36,7 @@
   },
   "dependencies": {
     "dfe-autocomplete": "github:DFE-Digital/dfe-autocomplete#1d4cc65039e11cc3ba9e7217a719b8128d0e4d53",
-    "govuk-frontend": "^5.14.0"
+    "govuk-frontend": "^6.1.0"
   },
   "standard": {
     "globals": [