make code robust to presence or absence of terminal slash in odoo server url

orders/static/js/orders_helper.js

@@ -1420,6 +1420,7 @@ function get_order_attachments() {
             contentType: "application/json; charset=utf-8",
             success: function(data) {
                 for (let res_po of data.res) {
+                    odoo_server = odoo_server.replace(/\/$/, '');  // Supprime le / à la fin de l'URL s'il existe
                     $(`#download_attachment_${res_po.id_po}`).attr('href', `${odoo_server}/web/content/${res_po.id_attachment}?download=true`);
                 }