Add alt & title text to comments placeholder icon

Hi there,

There’s a smiley face placeholder (wp-content/themes/hestia/assets/img/placeholder.jpg) that goes in to the comments area on posts even if you have avatars turned off. There’s no alt or title text placed on it. A screenreader will announce this as “image”. Can we have alt and title text added to this? Perhaps “Avatar Placeholder” will do. The file needing modification is layout-functions.php, perhaps like so:

function hestia_comments_template() {
		if ( is_user_logged_in() ) {
			$current_user = get_avatar( wp_get_current_user(), 64 );
		} else {
			$current_user = '<img src="' . get_template_directory_uri() . '/assets/img/placeholder.jpg" alt="Avatar Placeholder" title="Avatar Placeholder" height="64" width="64"/>';
		}