Allow HTML in function file – Woocommerce – Checkout Add-ons

Hi everyone.

I am using woocommerce with the Checkout Add-ons.

I am using this code I got from this page:

// Add attributes to our checkout fields
function wc_add_checkout_add_ons_attributes( $checkout_fields ) {

    $add_on_id = 2; // change 3 to your add-on id

    if ( isset( $checkout_fields['add_ons'][ 'wc_checkout_add_ons_' . $add_on_id ] ) ) {
        $checkout_fields['add_ons'][ 'wc_checkout_add_ons_' . $add_on_id ]['description']   = "<a href='https://www.w3schools.com/html/'> Visit our HTML tutorial</a>";
        //Adds a maximum character length + description to this add on
    }

    return $checkout_fields;
}
add_filter( 'woocommerce_checkout_fields', 'wc_add_checkout_add_ons_attributes', 20 );

The code works.
But how can I make the html link work properly ? So far it is displayed as a normal text.

Thanks