Update rubocop-rails requirement from ~> 2.25.0 to ~> 2.29.1

Updates the requirements on [rubocop-rails](https://github.com/rubocop/rubocop-rails) to permit the latest version.
- [Release notes](https://github.com/rubocop/rubocop-rails/releases)
- [Changelog](https://github.com/rubocop/rubocop-rails/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-rails@v2.25.0...v2.29.1)

---
updated-dependencies:
- dependency-name: rubocop-rails
  dependency-version: 2.29.1
  dependency-type: direct:development
...

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

Author: dependabot[bot]

publify_amazon_sidebar.gemspec

@@ -27,7 +27,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "rubocop-capybara", "~> 2.21.0"
   spec.add_development_dependency "rubocop-factory_bot", "~> 2.26.1"
   spec.add_development_dependency "rubocop-performance", "~> 1.23.1"
-  spec.add_development_dependency "rubocop-rails", "~> 2.25.0"
+  spec.add_development_dependency "rubocop-rails", "~> 2.29.1"
   spec.add_development_dependency "rubocop-rspec", "~> 3.4.0"
   spec.add_development_dependency "rubocop-rspec_rails", "~> 2.30.0"
   spec.add_development_dependency "simplecov", "~> 0.22.0"