"Landing Pull Requests" is incompatible with repo setup in CONTRIBUTING.md

[seishun]

The "Technical HOWTO" section in COLLABORATOR_GUIDE.md "assumes your repo is set up as detailed in CONTRIBUTING.md".

However, the "Step 1: Fork" section in CONTRIBUTING.md suggests setting up upstream as git://github.com/nodejs/node.git. When trying to push to it, git returns the following error:

fatal: remote error:
  You can't push to git://github.com/nodejs/node.git
  Use https://github.com/nodejs/node.git

Is there a particular reason why CONTRIBUTING.md uses a git:// link? Can we just replace that with git@github.com:nodejs/node.git?

[refack]

GitHub recommends using the https urls, so IMHO CONTRIBUTING.md should use the https (we require 2FA from Collaboratos anyway)
Ref: https://help.github.com/articles/which-remote-url-should-i-use/