Update rubocop-govuk requirement from = 4.17.1 to = 5.0.1

Updates the requirements on [rubocop-govuk](https://github.com/alphagov/rubocop-govuk) to permit the latest version.
- [Changelog](https://github.com/alphagov/rubocop-govuk/blob/main/CHANGELOG.md)
- [Commits](alphagov/rubocop-govuk@v4.17.1...v5.0.1)

---
updated-dependencies:
- dependency-name: rubocop-govuk
  dependency-type: direct:development
...

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

govuk-components.gemspec

@@ -30,7 +30,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "pry-byebug"
   spec.add_development_dependency "rspec-html-matchers", "~> 0.9"
   spec.add_development_dependency "rspec-rails"
-  spec.add_development_dependency "rubocop-govuk", "= 4.17.1"
+  spec.add_development_dependency "rubocop-govuk", "= 5.0.1"
   spec.add_development_dependency "sassc-rails"
   spec.add_development_dependency("simplecov", "~> 0.20")
   spec.add_development_dependency "sqlite3"