Document cursor moving between adjacent outputs
Document cursor moving between adjacent outputs

Add a sentence to sway-output.5.scd to highlight that the cursor can
only be moved between immediately adjacent outputs.

References issue #3529

Signed-off-by: Peter Grayson <e3b6cda228242c30b711ac17cb264f1dbadfd0b6@jpgrayson.net>

1ace/sway,ascent12/sway,1ace/sway,1ace/sway,ascent12/sway,ascent12/sway,SirCmpwn/sway