Fixed another rubocop setting

Author: pgruener

spec/react_on_rails/react_component/render_options_spec.rb

@@ -75,13 +75,13 @@ def the_attrs(react_component_name: "App", options: {})
 
         it "is memoized" do
           opts = described_class.new(the_attrs)
-          generated_value = opt.dom_id
+          generated_value = opts.dom_id
 
           expect(opts.instance_variable_get(:@dom_id)).to eq generated_value
           expect(opts.instance_variable_get(:@dom_id)).to eq opt.dom_id
 
-          opts.instance_variable_set(:@dom_id, '1234')
-          expect(opt.dom_id).to eq '1234'
+          opts.instance_variable_set(:@dom_id, "1234")
+          expect(opts.dom_id).to eq "1234"
         end
       end