Build(deps-dev): bump govuk_schemas from 6.2.3 to 6.3.0

Bumps [govuk_schemas](https://github.com/alphagov/govuk_schemas_gem) from 6.2.3 to 6.3.0.
- [Changelog](https://github.com/alphagov/govuk_schemas/blob/main/CHANGELOG.md)
- [Commits](alphagov/govuk_schemas@v6.2.3...v6.3.0)

---
updated-dependencies:
- dependency-name: govuk_schemas
  dependency-version: 6.3.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Gemfile.lock

@@ -210,7 +210,7 @@ GEM
       rouge
       sprockets (>= 3)
       sprockets-rails
-    govuk_schemas (6.2.3)
+    govuk_schemas (6.3.0)
       json-schema (>= 2.8, < 6.3)
     govuk_sidekiq (11.0.1)
       gds-api-adapters (>= 19.1.0)