[tor-wiki-changes] doc/MetricsTimeline edited

[Tor Bug Tracker & Wiki: dcf]

Fix up the "less than 3 bw auth" entry. 

([diff](https://trac.torproject.org/projects/tor/wiki/doc/MetricsTimeline?action=diff&version=230))

URL: https://trac.torproject.org/projects/tor/wiki/doc/MetricsTimeline?version=230