docs: fix node.js example (#637)

Author: jonog

docs/nodejs_example.md

@@ -47,7 +47,7 @@
 
     module.exports = function () {
       this.Given(/^I am on the Cucumber.js GitHub repository$/, function() {
-        return this.driver.get('https://github.com/cucumber/cucumber-js/tree/cr-readmeExample');
+        return this.driver.get('https://github.com/cucumber/cucumber-js/tree/master');
       });
 
       this.When(/^I click on "([^"]*)"$/, function (text) {