[FIX] account_edi_ubl: only add Description if it exist.

Description is line.name but if this field is not defined the tag in the XML should not be set.

closes odoo/odoo#60138

X-original-commit: a1d5981912631c871a3efb692e3c1a4e64bb5957
Signed-off-by: Laurent Smet <smetl@users.noreply.github.com>
Signed-off-by: bfr-o <bfr-o@users.noreply.github.com>

addons/account_edi_ubl/data/ubl_templates.xml

@@ -87,7 +87,7 @@
                         t-esc="format_monetary(tax['amount'])"/>
                 </cac:TaxTotal>
                 <cac:Item>
-                    <cbc:Description t-esc="line.name.replace('\n', ', ')"/>
+                    <cbc:Description t-if="line.name" t-esc="line.name.replace('\n', ', ')"/>
                     <cbc:Name t-esc="line.product_id.name"/>
                     <cac:SellersItemIdentification t-if="line.product_id.default_code">
                         <cbc:ID t-esc="line.product_id.default_code"/>