fix admin_settings_spec

spec/features/admin/admin_settings_spec.rb

@@ -73,7 +73,7 @@ feature 'Admin updates settings' do
   context 'sign-in restrictions', :js do
     it 'de-activates oauth sign-in source' do
-      find('.btn', text: 'GitLab.com').click
+      find('input#application_setting_enabled_oauth_sign_in_sources_[value=gitlab]').send_keys(:return)
       expect(find('.btn', text: 'GitLab.com')).not_to have_css('.active')
     end