override alt attribute of logo image

Hi, I have noticed that the logo image uploaded into the “options” tab, inherits the alt attribute from the wordpress “Site Title” field.

Looking at your documentation here https://quadmenu.com/documentation/developers/default-options/ I was wondering if inside

$defaults[‘navbar_logo’] = array(
‘url’ => QUADMENU_URL . ‘assets/frontend/images/logo.png’
);

.. was possible to override the alt attribute but it does not work. Is there another place in which doing that?