description update

git-svn-id: https://plugins.svn.wordpress.org/captcha-bank/trunk@806744 b8457f37-d9ea-0310-8a92-e5e31aec5664
Description Update

git-svn-id: https://plugins.svn.wordpress.org/captcha-bank/trunk@806747 b8457f37-d9ea-0310-8a92-e5e31aec5664