[FIX] website_sale: fix redirect on wrong coupon code

This commits fixes the case where you click on
edit address in eCommerce payment flow and you
type a wrong coupon code.

Without this commit, you are redirected at
/shop/payment instead of /shop/checkout

OPW-2290188

closes odoo/odoo#54646

X-original-commit: 0d658349
Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>
Signed-off-by: Nicolas Lempereur (nle) <nle@odoo.com>
Signed-off-by: Jason Van Malder (jvm) <jvm@odoo.com>

addons/website_sale/views/templates.xml

@@ -1079,7 +1079,9 @@
                             </t>
                         </div>
                         <div class="col-12 col-xl-auto order-xl-2 d-none d-xl-block">
-                            <t t-call="website_sale.cart_summary"/>
+                            <t t-call="website_sale.cart_summary">
+                                <t t-set="redirect">/shop/checkout</t>
+                            </t>
                         </div>
                         <div class="col-12 col-xl order-xl-1 oe_cart">
                             <div class="row">