Update cucumber requirement from ~> 8.0 to ~> 9.0

Updates the requirements on [cucumber](https://github.com/cucumber/cucumber-ruby) to permit the latest version.
- [Release notes](https://github.com/cucumber/cucumber-ruby/releases)
- [Changelog](https://github.com/cucumber/cucumber-ruby/blob/main/CHANGELOG.md)
- [Commits](cucumber/cucumber-ruby@v8.0.0...v9.0.1)

---
updated-dependencies:
- dependency-name: cucumber
  dependency-type: direct:development
...

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

puppet-blacksmith.gemspec

@@ -19,7 +19,7 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency 'puppet-modulebuilder', '~> 1.0'
   s.add_runtime_dependency 'rest-client', '~>2.0'
   s.add_development_dependency 'aruba', '~> 2.1'
-  s.add_development_dependency 'cucumber', '~> 8.0'
+  s.add_development_dependency 'cucumber', '~> 9.0'
   s.add_development_dependency 'puppet', '>= 7.24', '< 9'
   s.add_development_dependency 'rake', '~> 13.0', '>= 13.0.6'
   s.add_development_dependency 'rspec', '~> 3.12'