Bump govuk_publishing_components from 21.16.0 to 21.16.3

Bumps [govuk_publishing_components](https://github.com/alphagov/govuk_publishing_components) from 21.16.0 to 21.16.3.
- [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@v21.16.0...v21.16.3)

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

Gemfile

@@ -7,7 +7,7 @@ gem "dalli"
 gem "gds-api-adapters", "~> 63.1"
 gem "govuk_ab_testing", "~> 2.4"
 gem "govuk_app_config", "~> 2.0"
-gem "govuk_publishing_components", "~> 21.16.0"
+gem "govuk_publishing_components", "~> 21.16.3"
 gem "htmlentities", "~> 4.3"
 gem "plek", "~> 3.0"
 gem "rack_strip_client_ip", "~> 0.0.2"

Gemfile.lock

@@ -106,7 +106,7 @@ GEM
       sentry-raven (>= 2.7.1, < 2.12.0)
       statsd-ruby (~> 1.4.0)
       unicorn (>= 5.4, < 5.6)
-    govuk_publishing_components (21.16.0)
+    govuk_publishing_components (21.16.3)
       gds-api-adapters
       govuk_app_config
       kramdown
@@ -238,7 +238,7 @@ GEM
     rb-inotify (0.10.0)
       ffi (~> 1.0)
     regexp_parser (1.6.0)
-    request_store (1.4.1)
+    request_store (1.5.0)
       rack (>= 1.4)
     rest-client (2.1.0)
       http-accept (>= 1.7.0, < 2.0)
@@ -362,7 +362,7 @@ DEPENDENCIES
   gds-api-adapters (~> 63.1)
   govuk_ab_testing (~> 2.4)
   govuk_app_config (~> 2.0)
-  govuk_publishing_components (~> 21.16.0)
+  govuk_publishing_components (~> 21.16.3)
   govuk_schemas (~> 4.0)
   govuk_test
   htmlentities (~> 4.3)