Bump parallel_tests from 2.27.1 to 2.28.0 (#9985)

Bumps [parallel_tests](https://github.com/grosser/parallel_tests) from 2.27.1 to 2.28.0.
- [Release notes](https://github.com/grosser/parallel_tests/releases)
- [Commits](https://github.com/grosser/parallel_tests/compare/v2.27.1...v2.28.0)

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

Gemfile

@@ -115,7 +115,7 @@ group :test do
   gem 'rspec-sidekiq', '~> 3.0'
   gem 'simplecov', '~> 0.16', require: false
   gem 'webmock', '~> 3.5'
-  gem 'parallel_tests', '~> 2.27'
+  gem 'parallel_tests', '~> 2.28'
 end
 
 group :development do

Gemfile.lock

@@ -390,7 +390,7 @@ GEM
       av (~> 0.9.0)
       paperclip (>= 2.5.2)
     parallel (1.13.0)
-    parallel_tests (2.27.1)
+    parallel_tests (2.28.0)
       parallel
     parser (2.6.0.0)
       ast (~> 2.4.0)
@@ -722,7 +722,7 @@ DEPENDENCIES
   ox (~> 2.10)
   paperclip (~> 6.0)
   paperclip-av-transcoder (~> 0.6)
-  parallel_tests (~> 2.27)
+  parallel_tests (~> 2.28)
   pg (~> 1.1)
   pghero (~> 2.2)
   pkg-config (~> 1.3)