Bump rubocop-rails from 2.27.0 to 2.28.0

Bumps [rubocop-rails](https://github.com/rubocop/rubocop-rails) from 2.27.0 to 2.28.0.
- [Release notes](https://github.com/rubocop/rubocop-rails/releases)
- [Changelog](https://github.com/rubocop/rubocop-rails/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-rails@v2.27.0...v2.28.0)

---
updated-dependencies:
- dependency-name: rubocop-rails
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Gemfile

@@ -64,7 +64,7 @@ group :development do
   gem 'rubocop-capybara', '~> 2.21'
   gem 'rubocop-factory_bot', '~> 2.26', require: false
   gem 'rubocop-performance', '~> 1.23', require: false
-  gem 'rubocop-rails', '~> 2.27', require: false
+  gem 'rubocop-rails', '~> 2.28', require: false
   gem 'rubocop-rake', '~> 0.6.0', require: false
   gem 'rubocop-rspec', '~> 3.3', require: false
   gem 'rubocop-rspec_rails', '~> 2.30.0', require: false

Gemfile.lock

@@ -138,7 +138,7 @@ GEM
       erubi (>= 1.0.0)
       rack (>= 0.9.0)
       rouge (>= 1.0.0)
-    bigdecimal (3.1.8)
+    bigdecimal (3.1.9)
     binding_of_caller (1.0.1)
       debug_inspector (>= 1.2.0)
     bootsnap (1.18.4)
@@ -462,7 +462,7 @@ GEM
       parser (~> 3.3.0)
       rainbow (>= 2.0, < 4.0)
       rexml (~> 3.1)
-    regexp_parser (2.9.3)
+    regexp_parser (2.10.0)
     reline (0.6.0)
       io-console (~> 0.5)
     request_store (1.7.0)
@@ -519,7 +519,7 @@ GEM
     rubocop-performance (1.23.0)
       rubocop (>= 1.48.1, < 2.0)
       rubocop-ast (>= 1.31.1, < 2.0)
-    rubocop-rails (2.27.0)
+    rubocop-rails (2.28.0)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
       rubocop (>= 1.52.0, < 2.0)
@@ -653,7 +653,7 @@ DEPENDENCIES
   rubocop-capybara (~> 2.21)
   rubocop-factory_bot (~> 2.26)
   rubocop-performance (~> 1.23)
-  rubocop-rails (~> 2.27)
+  rubocop-rails (~> 2.28)
   rubocop-rake (~> 0.6.0)
   rubocop-rspec (~> 3.3)
   rubocop-rspec_rails (~> 2.30.0)