Fix: Incorrect rounding for lightning amounts (btcpayserver#6201)

BTCPayServer/Payments/Lightning/LightningLikePaymentHandler.cs

@@ -89,7 +89,7 @@ public async Task ConfigurePrompt(PaymentMethodContext context)
             var nodeInfo = GetNodeInfo(config, context.Logs, preferOnion);
 
             var invoice = context.InvoiceEntity;
-            decimal due = Extensions.RoundUp(invoice.Price / paymentPrompt.Rate, _Network.Divisibility);
+            decimal due = Extensions.RoundUp(invoice.Price / paymentPrompt.Rate, paymentPrompt.Divisibility);
             try
             {
                 due = paymentPrompt.Calculate().Due;