cli: revise help text for addinvoice lncli command [skip ci]

lnrpc/invoicesrpc/addinvoice.go

@@ -284,7 +284,7 @@ func AddInvoice(ctx context.Context, cfg *AddInvoiceConfig,
 
 	// We only include the amount in the invoice if it is greater than 0.
 	// By not including the amount, we enable the creation of invoices that
-	// allow the payee to specify the amount of satoshis they wish to send.
+	// allow the payer to specify the amount of satoshis they wish to send.
 	if amtMSat > 0 {
 		options = append(options, zpay32.Amount(amtMSat))
 	}

lnrpc/routerrpc/router_backend.go

@@ -691,7 +691,7 @@ func (r *RouterBackend) extractIntentFromSendRequest(
 		}
 
 		// If the amount was not included in the invoice, then we let
-		// the payee specify the amount of satoshis they wish to send.
+		// the payer specify the amount of satoshis they wish to send.
 		// We override the amount to pay with the amount provided from
 		// the payment request.
 		if payReq.MilliSat == nil {