Update Node.gitignore

Updated link for the dependency directory from [this](https://npmjs.org/doc/faq.html#Should-I-check-my-node_modules-folder-into-git) to [this](https://www.npmjs.org/doc/misc/npm-faq.html#should-i-check-my-node_modules-folder-into-git-).
Merge pull request #1164 from joreyaesh/master

Updated link in Node.gitignore