Bump govuk_publishing_components from 23.14.0 to 23.15.0

Bumps [govuk_publishing_components](https://github.com/alphagov/govuk_publishing_components) from 23.14.0 to 23.15.0.
- [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@v23.14.0...v23.15.0)

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

Author: dependabot[bot]

Gemfile.lock

@@ -119,7 +119,7 @@ GEM
       sentry-raven (~> 3.1.1)
       statsd-ruby (~> 1.5.0)
       unicorn (>= 5.4, < 5.9)
-    govuk_publishing_components (23.14.0)
+    govuk_publishing_components (23.15.0)
       govuk_app_config
       kramdown
       plek
@@ -139,7 +139,7 @@ GEM
     http-accept (1.7.0)
     http-cookie (1.0.3)
       domain_name (~> 0.5)
-    i18n (1.8.7)
+    i18n (1.8.8)
       concurrent-ruby (~> 1.0)
     image_size (2.1.0)
     io-like (0.3.1)
@@ -187,7 +187,7 @@ GEM
     mocha (1.11.2)
     multipart-post (2.1.1)
     netrc (0.11.0)
-    nio4r (2.5.4)
+    nio4r (2.5.5)
     nokogiri (1.11.1)
       mini_portile2 (~> 2.5.0)
       racc (~> 1.4)