Lower required Ruby version to 3.0.0

This change modifies the required Ruby version in the gemspec file from 3.1.0 to 3.0.0. It ensures compatibility with systems running Ruby 3.0.0 and later, broadening the potential user base.

servactory-rubocop.gemspec

@@ -27,7 +27,7 @@ Gem::Specification.new do |spec|
   spec.files = Dir["rubocop.yml"]
   spec.require_paths = ["lib"]
 
-  spec.required_ruby_version = Gem::Requirement.new(">= 3.1.0")
+  spec.required_ruby_version = Gem::Requirement.new(">= 3.0.0")
 
   spec.add_dependency "rubocop-factory_bot"
   spec.add_dependency "rubocop-performance"