Update help

Signed-off-by: jcsiadal <jeremy.c.siadal@intel.com>

internal/app/wwctl/overlay/chown/root.go

@@ -4,10 +4,10 @@ import "github.com/spf13/cobra"
 
 var (
 	baseCmd = &cobra.Command{
-		Use:   "chown [flags] (overlay kind) (overlay name) (path) (UID) [(GID)]",
+		Use:   "chown [OPTIONS] {system|runtime} OVERLAY_NAME FILE UID [GID]",
 		Short: "Change file ownership within an overlay",
-		Long: "This command will allow you to change the ownership of a file within an\n" +
-			"overlay.",
+		Long: "This command changes the ownership of a FILE within the system or runtime OVERLAY_NAME\n" +
+			"to the user specified by UID. Optionally, it will also change group ownership to GID.",
 		RunE: CobraRunE,
 		Args: cobra.RangeArgs(4, 5),
 	}