Update rubocop-factory_bot requirement from ~> 2.27.1 to ~> 2.28.0

Updates the requirements on [rubocop-factory_bot](https://github.com/rubocop/rubocop-factory_bot) to permit the latest version.
- [Release notes](https://github.com/rubocop/rubocop-factory_bot/releases)
- [Changelog](https://github.com/rubocop/rubocop-factory_bot/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-factory_bot@v2.27.1...v2.28.0)

---
updated-dependencies:
- dependency-name: rubocop-factory_bot
  dependency-version: 2.28.0
  dependency-type: direct:development
...

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

Author: dependabot[bot]

publify_textfilter_code.gemspec

@@ -26,7 +26,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency "rspec-rails", "~> 6.0"
   s.add_development_dependency "rubocop", "~> 1.80.2"
   s.add_development_dependency "rubocop-capybara", "~> 2.22.1"
-  s.add_development_dependency "rubocop-factory_bot", "~> 2.27.1"
+  s.add_development_dependency "rubocop-factory_bot", "~> 2.28.0"
   s.add_development_dependency "rubocop-performance", "~> 1.26.1"
   s.add_development_dependency "rubocop-rails", "~> 2.33.3"
   s.add_development_dependency "rubocop-rspec", "~> 3.7.0"