Shortcode Error Fixed in readme.txt

git-svn-id: https://plugins.svn.wordpress.org/kings-different-content-for-members/trunk@928773 b8457f37-d9ea-0310-8a92-e5e31aec5664
readme.txt fixed 

git-svn-id: https://plugins.svn.wordpress.org/kings-different-content-for-members/trunk@928774 b8457f37-d9ea-0310-8a92-e5e31aec5664