Update cucumber requirement from ~> 8 to ~> 9 in /test

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>

test/Gemfile

@@ -1,6 +1,6 @@
 source "https://rubygems.org"
 
 group :test do
-  gem 'cucumber', '~> 8'
+  gem 'cucumber', '~> 9'
   gem 'rspec', '~> 3'
 end