fixing syntax in readme

git-svn-id: https://plugins.svn.wordpress.org/wp-category-tag-could/trunk@958786 b8457f37-d9ea-0310-8a92-e5e31aec5664
fixing syntax in readme

git-svn-id: https://plugins.svn.wordpress.org/wp-category-tag-could/trunk@958787 b8457f37-d9ea-0310-8a92-e5e31aec5664