Update translation files

Updated by "Update PO files to match POT (msgmerge)" hook in Weblate.

Translation: sale-workflow-13.0/sale-workflow-13.0-sale_fixed_discount
Translate-URL: https://translation.odoo-community.org/projects/sale-workflow-13-0/sale-workflow-13-0-sale_fixed_discount/

sale_fixed_discount/i18n/es.po

@@ -18,6 +18,7 @@ msgstr ""
 
 #. module: sale_fixed_discount
 #: model_terms:ir.ui.view,arch_db:sale_fixed_discount.report_saleorder_document
+#: model_terms:ir.ui.view,arch_db:sale_fixed_discount.sale_order_portal_content_fixed_discount
 msgid "<span>Disc. Fixed Amount</span>"
 msgstr "<span>Desc. Monto fijo</span>"