Bump govuk_publishing_components from 28.8.1 to 28.9.0

Bumps [govuk_publishing_components](https://github.com/alphagov/govuk_publishing_components) from 28.8.1 to 28.9.0.
- [Release notes](https://github.com/alphagov/govuk_publishing_components/releases)
- [Changelog](https://github.com/alphagov/govuk_publishing_components/blob/master/CHANGELOG.md)
- [Commits](alphagov/govuk_publishing_components@v28.8.1...v28.9.0)

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

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

Author: dependabot[bot]

Gemfile.lock

@@ -120,7 +120,7 @@ GEM
     govuk_personalisation (0.11.2)
       plek (>= 1.9.0)
       rails (>= 6, < 8)
-    govuk_publishing_components (28.8.1)
+    govuk_publishing_components (28.9.0)
       govuk_app_config
       govuk_personalisation (>= 0.7.0)
       kramdown