Update rubocop requirement from ~> 1.65.0 to ~> 1.66.1

Updates the requirements on [rubocop](https://github.com/rubocop/rubocop) to permit the latest version.
- [Release notes](https://github.com/rubocop/rubocop/releases)
- [Changelog](https://github.com/rubocop/rubocop/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop@v1.65.0...v1.66.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile

@@ -11,7 +11,7 @@ gem 'ffaker', require: false # For testing
 gem 'minitest', '~> 5.14' # For test
 gem 'railties', require: false # For Rails integration testing
 gem 'rake', '~> 13.0' # For test and automation
-gem 'rubocop', '~> 1.65.0', require: false # For lint
+gem 'rubocop', '~> 1.66.1', require: false # For lint
 gem 'rubocop-gem_dev', '>= 0.3.0', require: false # For lint
 gem 'rubocop-md', '~> 1.0', require: false # For lint
 gem 'rubocop-minitest', '~> 0.35.0', require: false # For lint