[FIX] pos_cash_rounding: fixup float_is_zero usage

WHY:

* float_is_zero doesn't work without second argument
  https://github.com/odoo/odoo/blob/c90427dfba26854cda5d54f813cccc4948685077/addons/web/static/src/js/core/utils.js#L59-L62
* the fixed line of code was introduced in #60642

closes odoo/odoo#61097

X-original-commit: 792ebaf8494a42f91e4251acf2f74f89ff9f5e6e
Signed-off-by: Ivan Yelizariev // IEL <yelizariev@users.noreply.github.com>

addons/point_of_sale/static/src/js/models.js

@@ -3262,7 +3262,7 @@ exports.Order = Backbone.Model.extend({
 
             var rounding_applied = total - (this.pos.config['iface_tax_included'] === "total"? this.get_subtotal(): this.get_total_with_tax());
             // because floor and ceil doesn't include decimals in calculation, we reuse the value of the half-up and adapt it.
-            if (utils.float_is_zero(rounding_applied)){
+            if (utils.float_is_zero(rounding_applied, this.pos.currency.decimals)){
                 // https://xkcd.com/217/
                 return 0;
             } else if(this.pos.cash_rounding[0].rounding_method === "UP" && rounding_applied < 0) {