Enfold doesn't see meta tag with format detection

Hi.
I need to put this meta tag in my code: <meta name=”format-detection” content=”telephone=no”> so make phone numbers in MS Edge display as in other browsers (without pointer and underline).
I’ve tried adding above tag to header.php as well as I’ve tried to put below code in functions.php:
function add_custom_code(){
$output = “<meta name=’format-detection’ content=’telephone=no’>”;
return $output;
}
add_action(‘wp_head’, ‘add_custom_code’);

Both ways didn’t work. Meta tag still doesn’t show in source of my page so Edge detects phone numbers. I am sending you temp admin login and waiting for your help! Thank you!