psh/route: fix routeInfo message

change `psh_routeInfo` to display message appropriate to the command's functionality

psh/route/route.c

@@ -58,7 +58,7 @@ void psh_routeUsage(void)
 
 static void psh_routeInfo(void)
 {
-	printf("prints the name of current working directory");
+	printf("show and manipulate the IP routing table");
 }