Bump govuk_publishing_components from 21.8.1 to 21.9.0

Bumps [govuk_publishing_components](https://github.com/alphagov/govuk_publishing_components) from 21.8.1 to 21.9.0.
- [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@v21.8.1...v21.9.0)

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

Author: dependabot-preview[bot]

Gemfile

@@ -8,7 +8,7 @@ gem "gds-api-adapters", "~> 60.0"
 gem "govuk_ab_testing", "~> 2.4"
 gem "govuk_app_config", "~> 2.0"
 gem "govuk_frontend_toolkit", "~> 8.2.0"
-gem "govuk_publishing_components", "~> 21.8.1"
+gem "govuk_publishing_components", "~> 21.9.0"
 gem "htmlentities", "~> 4.3"
 gem "plek", "~> 3.0"
 gem "rack_strip_client_ip", "~> 0.0.2"

Gemfile.lock

@@ -114,7 +114,7 @@ GEM
     govuk_frontend_toolkit (8.2.0)
       railties (>= 3.1.0)
       sass (>= 3.2.0)
-    govuk_publishing_components (21.8.1)
+    govuk_publishing_components (21.9.0)
       gds-api-adapters
       govuk_app_config
       kramdown
@@ -187,7 +187,7 @@ GEM
     multipart-post (2.1.1)
     netrc (0.11.0)
     nio4r (2.5.2)
-    nokogiri (1.10.4)
+    nokogiri (1.10.5)
       mini_portile2 (~> 2.4.0)
     null_logger (0.0.1)
     parallel (1.18.0)
@@ -368,7 +368,7 @@ DEPENDENCIES
   govuk_ab_testing (~> 2.4)
   govuk_app_config (~> 2.0)
   govuk_frontend_toolkit (~> 8.2.0)
-  govuk_publishing_components (~> 21.8.1)
+  govuk_publishing_components (~> 21.9.0)
   govuk_schemas (~> 4.0)
   govuk_test
   htmlentities (~> 4.3)