[FIX] sale_stock: remove redundant css class for correct pdf rendering

Reproduction:
1. Install Sales, Stock
2. Place an order with any product, in the Other Info tab, type in
anything for Customer Reference
3. Confirm the Order, Go to Delivery, Validate the delivery
4. Print the Delivery Slip, and the customer reference part is
overlapping with other text

Reason: the unnecessary CSS attribute <row> is causing an overlapping
when rendering the delivery template

Fix: remove <row> and reformatting the code

A correct example of adding extra info (done without row): https://github.com/odoo-dev/odoo/blob/16.0/addons/delivery/views/report_deliveryslip.xml#L4-L17

closes odoo/odoo#107726

X-original-commit: 863a9cf159da9691744f08a915e12f477342dbc3
Signed-off-by: Yannick Tivisse (yti) <yti@odoo.com>
Signed-off-by: Liu Jinjiu (jili) <jili@odoo.com>

addons/sale_stock/report/stock_report_deliveryslip.xml

@@ -2,11 +2,9 @@
 <odoo>
     <template id="report_delivery_document_inherit_sale_stock" inherit_id="stock.report_delivery_document">
         <xpath expr="//div[@name='div_sched_date']" position="after">
-            <div class="row justify-content-end" t-if="o.sudo().sale_id.client_order_ref">
-                <div class="col-auto">
-                    <strong>Customer Reference:</strong>
-                    <p t-field="o.sudo().sale_id.client_order_ref"/>
-                </div>
+            <div class="col-auto justify-content-end" t-if="o.sudo().sale_id.client_order_ref">
+                <strong>Customer Reference:</strong>
+                <p t-field="o.sudo().sale_id.client_order_ref"/>
             </div>
         </xpath>
     </template>