[rb] fix safari tests

Author: titusfortner

rb/spec/unit/selenium/webdriver/safari/driver_spec.rb

@@ -95,6 +95,8 @@ def expect_request(body: nil, endpoint: nil)
         end
 
         context 'with :capabilities' do
+          before { allow(DriverFinder).to receive(:path) }
+
           it 'accepts value as a Symbol' do
             expect_request(body: {capabilities: {alwaysMatch: {browserName: 'safari'}}})
             expect { described_class.new(capabilities: :safari) }.to have_deprecated(:capabilities)