Downgrade rubygems requirement

Author: luke-hill

ruby/cucumber-ci-environment.gemspec

@@ -11,7 +11,7 @@ Gem::Specification.new do |s|
   s.platform    = Gem::Platform::RUBY
   s.license     = 'MIT'
   s.required_ruby_version = '>= 2.6'
-  s.required_rubygems_version = '>= 3.0.8'
+  s.required_rubygems_version = '>= 3.0.3'
 
   s.metadata = {
     'bug_tracker_uri' => 'https://github.com/cucumber/ci-environment/issues',