Bump govuk-frontend

Bumps [govuk-frontend](https://github.com/alphagov/govuk-frontend) from 4.7.0 to 5.1.0.
- [Release notes](https://github.com/alphagov/govuk-frontend/releases)
- [Changelog](https://github.com/alphagov/govuk-frontend/blob/main/CHANGELOG.md)
- [Commits](alphagov/govuk-frontend@v4.7.0...v5.1.0)

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

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

src/ServiceAssessmentService/ServiceAssessmentService.WebApp/package.json

@@ -6,7 +6,7 @@
   "version": "0.0.1",
   "dependencies": {
     "dfe-frontend-alpha": "^1.0.1",
-    "govuk-frontend": "^4.7.0" 
+    "govuk-frontend": "^5.1.0" 
   },
   "devDependencies": {
     "copy-webpack-plugin": "^12.0.2",