Update README.md

Author: t32k

README.md

@@ -65,7 +65,7 @@ You can set the `sortOrder` option if you want to use the order to which you are
 grunt.initConfig({
   csscomb: {
     options: {
-      sortOrder: 'path-to-your-custom-sort-order.json '
+      sortOrder: '/path/to/custom-sort-order.json'
     },
     files: {
       'dest/resorted-foo.css': ['src/foo.css'],