Update launchy requirement from ~> 2.5 to >= 2.5, < 4.0

Updates the requirements on [launchy](https://github.com/copiousfreetime/launchy) to permit the latest version.
- [Changelog](https://github.com/copiousfreetime/launchy/blob/main/README.md)
- [Commits](copiousfreetime/launchy@v2.5.0...v3.0.0)

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

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

cf-uaac.gemspec

@@ -40,7 +40,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'ci_reporter_rspec', '~> 1.0'
   s.add_runtime_dependency 'highline', '>= 2', '< 4'
   s.add_runtime_dependency 'eventmachine', '~> 1.2'
-  s.add_runtime_dependency 'launchy', '~> 2.5'
+  s.add_runtime_dependency 'launchy', '>= 2.5', '< 4.0'
   s.add_runtime_dependency 'em-http-request', '~> 1.1', '>= 1.1.2'
   s.add_runtime_dependency 'json_pure', '~>2.6'
   s.add_runtime_dependency 'rack', '~>3.0'