Bump govuk_publishing_components from 38.0.1 to 39.2.1

Bumps [govuk_publishing_components](https://github.com/alphagov/govuk_publishing_components) from 38.0.1 to 39.2.1.
- [Changelog](https://github.com/alphagov/govuk_publishing_components/blob/main/CHANGELOG.md)
- [Commits](alphagov/govuk_publishing_components@v38.0.1...v39.2.1)

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

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