Bump the npm-updates group across 1 directory with 3 updates

Bumps the npm-updates group with 3 updates in the / directory: [@x-govuk/govuk-prototype-components](https://github.com/x-govuk/govuk-prototype-components), [govuk-frontend](https://github.com/alphagov/govuk-frontend) and [i.ai-design-system](https://github.com/i-dot-ai/design-system).


Updates `@x-govuk/govuk-prototype-components` from 3.0.6 to 3.0.9
- [Release notes](https://github.com/x-govuk/govuk-prototype-components/releases)
- [Changelog](https://github.com/x-govuk/govuk-prototype-components/blob/main/docs/release-notes.md)
- [Commits](x-govuk/govuk-prototype-components@v3.0.6...v3.0.9)

Updates `govuk-frontend` from 5.5.0 to 5.7.1
- [Release notes](https://github.com/alphagov/govuk-frontend/releases)
- [Changelog](https://github.com/alphagov/govuk-frontend/blob/main/CHANGELOG.md)
- [Commits](alphagov/govuk-frontend@v5.5.0...v5.7.1)

Updates `i.ai-design-system` from 0.4.3 to 0.4.8
- [Commits](https://github.com/i-dot-ai/design-system/commits)

---
updated-dependencies:
- dependency-name: "@x-govuk/govuk-prototype-components"
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: npm-updates
- dependency-name: govuk-frontend
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: npm-updates
- dependency-name: i.ai-design-system
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: npm-updates
...

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