Update man page
Update man page

The man page mentioned that "indicator" wasn't implemented, this isn't
the case anymore.

ascent12/sway,1ace/sway,1ace/sway,4e554c4c/sway,mikkeloscar/sway,1ace/sway,ascent12/sway,sleep-walker/sway,taiyu-len/sway,taiyu-len/sway,johalun/sway,ptMuta/sway,4e554c4c/sway,taiyu-len/sway,mikkeloscar/sway,sleep-walker/sway,ascent12/sway,SirCmpwn/sway