[tor-wiki-changes] org/operations/Guidelines edited

[Tor Bug Tracker & Wiki: atagar]

Adding stem's site. It's just a static sphinx generated site so not sure if it's really something we want to list or not. 

([diff](https://trac.torproject.org/projects/tor/wiki/org/operations/Guidelines?action=diff&version=24))

URL: https://trac.torproject.org/projects/tor/wiki/org/operations/Guidelines?version=24