Update dependency rubocop-rspec to v2.30.0

Author: renovate[bot]

Gemfile

@@ -25,4 +25,4 @@ gemspec
 
 gem 'rake', '13.2.1', require: false
 gem 'rubocop', '1.59.0', require: false
-gem 'rubocop-rspec', '2.29.2', require: false
+gem 'rubocop-rspec', '2.30.0', require: false