Update CleanTalk account link in README

Author: shagimuratov

README.md

@@ -114,7 +114,7 @@ Installation completed successfully.
 
 * PHP 5.6 or higher
 * Wordpress 3.0 or higher
-* CleanTalk account https://cleantalk.org/register?product_name=security
+* CleanTalk Security account [https://cleantalk.org/wordpress-security-plugin](https://cleantalk.org/wordpress-security-plugin)
 
 **Installation from wordpress.org directory**