swaymsg: s/inactive/disabled/

The JSON field is named "active", but that's confusing for users:
`output disable` is the command which results in `active = false`
outputs. Use the same terminology in end-user messages.

swaymsg/main.c

@@ -259,7 +259,7 @@ static void pretty_print_output(json_object *o) {
 			json_object_get_string(adaptive_sync_status));
 	} else {
 		printf(
-			"Output %s '%s %s %s' (inactive)\n",
+			"Output %s '%s %s %s' (disabled)\n",
 			json_object_get_string(name),
 			json_object_get_string(make),
 			json_object_get_string(model),