Modified readme.txt

git-svn-id: https://plugins.svn.wordpress.org/super-simple-related-posts/trunk@776445 b8457f37-d9ea-0310-8a92-e5e31aec5664
Modified readme.txt

git-svn-id: https://plugins.svn.wordpress.org/super-simple-related-posts/trunk@776447 b8457f37-d9ea-0310-8a92-e5e31aec5664