docs/new_installation: rework documentation installation note
docs/new_installation: rework documentation installation note

Shift and reword it into the bullet.

Also, use auto-enumeration for that bullet, and for the South one too.

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