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.

sway/sway.5.scd

@@ -85,6 +85,9 @@ The following commands may only be used in the configuration file.
 	It can be disabled by setting the command to a single dash:
 	_swaynag\_command -_
 
+*workspace_layout* default|stacking|tabbed
+	Specifies the initial layout for new workspaces.
+
 *xwayland* enable|disable|force
 	Enables or disables Xwayland support, which allows X11 applications to be
 	used. _enable_ will lazily load Xwayland so Xwayland will not be launched
@@ -753,9 +756,6 @@ The default colors are:
 	switch to workspace 2, then invoke the "workspace 2" command again, you
 	will be returned to workspace 1. Default is _no_.
 
-*workspace_layout* default|stacking|tabbed
-	Specifies the initial layout for new workspaces.
-
 # CRITERIA
 
 A criteria is a string in the form of, for example: