Bump govuk_publishing_components from 25.5.0 to 25.6.0

Bumps [govuk_publishing_components](https://github.com/alphagov/govuk_publishing_components) from 25.5.0 to 25.6.0.
- [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@v25.5.0...v25.6.0)

---
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

@@ -130,7 +130,7 @@ GEM
       sentry-ruby (~> 4.5.0)
       statsd-ruby (~> 1.5.0)
       unicorn (>= 5.4, < 5.9)
-    govuk_publishing_components (25.5.0)
+    govuk_publishing_components (25.6.0)
       govuk_app_config
       kramdown
       plek
@@ -190,7 +190,7 @@ GEM
     mime-types (3.3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2021.0704)
-    mini_mime (1.1.0)
+    mini_mime (1.1.1)
     mini_portile2 (2.5.3)
     minitest (5.14.4)
     minitest-capybara (0.9.0)
@@ -240,7 +240,7 @@ GEM
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
       nokogiri (>= 1.6)
-    rails-html-sanitizer (1.4.1)
+    rails-html-sanitizer (1.4.2)
       loofah (~> 2.3)
     railties (6.1.4.1)
       actionpack (= 6.1.4.1)