Update rubocop-rspec requirement from ~> 2.26.1 to ~> 3.0.1

Updates the requirements on [rubocop-rspec](https://github.com/rubocop/rubocop-rspec) to permit the latest version.
- [Release notes](https://github.com/rubocop/rubocop-rspec/releases)
- [Changelog](https://github.com/rubocop/rubocop-rspec/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-rspec@v2.26.1...v3.0.1)

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

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

cloudflare-rails.gemspec

@@ -28,7 +28,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'rubocop', '~> 1.64.1'
   spec.add_development_dependency 'rubocop-performance', '~> 1.21.0'
   spec.add_development_dependency 'rubocop-rails', '~> 2.25.0'
-  spec.add_development_dependency 'rubocop-rspec', '~> 2.26.1'
+  spec.add_development_dependency 'rubocop-rspec', '~> 3.0.1'
   spec.add_development_dependency 'webmock', '~> 3.23.1'
 
   spec.add_dependency 'actionpack', '>= 7.1.0', '< 8.1.0'