docs/new_installation: re-flow first bullet's text
docs/new_installation: re-flow first bullet's text

As a side-effect, the first bullet is now correctly detected/displayed
as part of the overall list - previously, the list was thought to start
at #2.

twidi/satchmo,Ryati/satchmo,dokterbob/satchmo,dokterbob/satchmo,ringemup/satchmo,ringemup/satchmo,twidi/satchmo,Ryati/satchmo