Bump govuk_publishing_components from 35.20.0 to 35.21.0

Bumps [govuk_publishing_components](https://github.com/alphagov/govuk_publishing_components) from 35.20.0 to 35.21.0.
- [Changelog](https://github.com/alphagov/govuk_publishing_components/blob/main/CHANGELOG.md)
- [Commits](alphagov/govuk_publishing_components@v35.20.0...v35.21.0)

---
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

@@ -185,7 +185,7 @@ GEM
     govuk_personalisation (0.15.0)
       plek (>= 1.9.0)
       rails (>= 6, < 8)
-    govuk_publishing_components (35.20.0)
+    govuk_publishing_components (35.21.0)
       govuk_app_config
       govuk_personalisation (>= 0.7.0)
       kramdown
@@ -534,7 +534,7 @@ GEM
       mime-types (>= 1.16, < 4.0)
       netrc (~> 0.8)
     rexml (3.2.6)
-    rouge (4.1.3)
+    rouge (4.2.0)
     rspec-core (3.12.2)
       rspec-support (~> 3.12.0)
     rspec-expectations (3.12.3)