Update cucumber requirement from >= 4.0, < 8.0 to >= 4.0, < 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@v4.0.0...v7.1.0)

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

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

aruba.gemspec

@@ -24,7 +24,7 @@ Gem::Specification.new do |spec|
   spec.add_runtime_dependency "bundler", [">= 1.17", "< 3.0"]
   spec.add_runtime_dependency "childprocess", [">= 2.0", "< 5.0"]
   spec.add_runtime_dependency "contracts", [">= 0.16.0", "< 0.18.0"]
-  spec.add_runtime_dependency "cucumber", ">= 4.0", "< 8.0"
+  spec.add_runtime_dependency "cucumber", ">= 4.0", "< 9.0"
   spec.add_runtime_dependency "rspec-expectations", "~> 3.4"
   spec.add_runtime_dependency "thor", "~> 1.0"