sway(5): move workspace_layout to config only
sway(5): move workspace_layout to config only

According to the source files, workspace_layout is a configuration only
command, move it to the correct section within the man page.

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