How to change to ‘index,follow’

Hi, on the Vantage Theme there is a meta tag which I would like to change it to ‘noindex,follow’ in order to have the website listed to search engines.

How can I do it? Via Editor in header.php file I could not find it but it can be seen on the page view source.

Any help welcomed. Thanks!

URL: http://www.antalyaofest.com