fix typo in examples/tests/nightwatch.js
fix typo in examples/tests/nightwatch.js

Test is hitting _nightwatchjs.org_ rather than _google.com_.
JonDum/nightwatch,prolificcoder/nightwatch,beatfactor/nightwatch,campbellwmorgan/nightwatch,obulisaravanan/nightwatch,awatson1978/nightwatch,campbellwmorgan/nightwatch,ervinb/nightwatch,nightwatchjs/nightwatch,aahill50/dibs-nightwatch,nightwatchjs/nightwatch,Crunch-io/nightwatch,matskiv/nightwatch,gatero/nightwatch,iabw/nightwatch,teleological/nightwatch,mbixby/nightwatch,mobify/nightwatch,LucioFranco/nightwatch,byron7g7/nightwatch,kpiwko/nightwatch,sknopf/nightwatch,feedhenry/nightwatch,lukaszw82/nightwatch,joel-airspring/nightwatch,Crunch-io/nightwatch,bluemind-net/nightwatch,vuthelinh/nightwatch,CoderK/nightwatch,ervinb/nightwatch,pmstss/nightwatch,miguelangelrr6/originnightwatch,aedile/nightwatch,joel-airspring/nightwatch