Bump govuk_publishing_components from 28.3.0 to 28.4.0

Bumps [govuk_publishing_components](https://github.com/alphagov/govuk_publishing_components) from 28.3.0 to 28.4.0.
- [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@v28.3.0...v28.4.0)

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

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

Gemfile.lock

@@ -128,7 +128,7 @@ GEM
     govuk_personalisation (0.11.1)
       plek (>= 1.9.0)
       rails (~> 6)
-    govuk_publishing_components (28.3.0)
+    govuk_publishing_components (28.4.0)
       govuk_app_config
       govuk_personalisation (>= 0.7.0)
       kramdown
@@ -220,7 +220,7 @@ GEM
       coderay (~> 1.1)
       method_source (~> 1.0)
     public_suffix (4.0.6)
-    puma (5.5.2)
+    puma (5.6.0)
       nio4r (~> 2.0)
     racc (1.6.0)
     rack (2.2.3)