Update payment-terms.md

Added {next} at the bottom of the page.

foundation/www/docs/user/manual/en/accounts/payment-terms.md

@@ -73,3 +73,5 @@ You can add Payments Terms in the "Payment Terms Schedule" section of the Docume
 **Invoice Portion:** The percentage portion of the document represented in each row.
 
 **Payment Amount:** The amount due from the portion of the invoice represented by each row.
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+{next}