Update rubocop-rspec requirement from ~> 2.26.0 to ~> 2.27.1 (#190)

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@v2.26.0...v2.27.1)

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

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Author: dependabot[bot]

Gemfile

@@ -10,5 +10,5 @@ group :development do
   gem 'rubocop', '~> 1.61.0'
   gem 'rubocop-performance', '~> 1.20.0'
   gem 'rubocop-rake', '~> 0.6.0'
-  gem 'rubocop-rspec', '~> 2.26.0'
+  gem 'rubocop-rspec', '~> 2.27.1'
 end