Update rubocop requirement from ~> 1.64.1 to ~> 1.77.0

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@v1.64.1...v1.77.0)

---
updated-dependencies:
- dependency-name: rubocop
  dependency-version: 1.77.0
  dependency-type: direct:development
...

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

Author: dependabot[bot]

publify_amazon_sidebar.gemspec

@@ -23,7 +23,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency "publify_core", "~> 10.0.0"
 
   spec.add_development_dependency "rspec-rails", "~> 6.0"
-  spec.add_development_dependency "rubocop", "~> 1.64.1"
+  spec.add_development_dependency "rubocop", "~> 1.77.0"
   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"