[rubygems/rubygems] Set CI global config to false in gem_helper_spec

https://github.com/rubygems/rubygems/commit/39b18fe7fc

spec/bundler/bundler/gem_helper_spec.rb

@@ -9,7 +9,7 @@ RSpec.describe Bundler::GemHelper do
   let(:app_gemspec_path) { app_path.join("#{app_name}.gemspec") }
 
   before(:each) do
-    global_config "BUNDLE_GEM__MIT" => "false", "BUNDLE_GEM__TEST" => "false", "BUNDLE_GEM__COC" => "false", "BUNDLE_GEM__RUBOCOP" => "false"
+    global_config "BUNDLE_GEM__MIT" => "false", "BUNDLE_GEM__TEST" => "false", "BUNDLE_GEM__COC" => "false", "BUNDLE_GEM__RUBOCOP" => "false", "BUNDLE_GEM__CI" => "false"
     bundle "gem #{app_name}"
     prepare_gemspec(app_gemspec_path)
   end