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

rpcserver.go

@@ -4851,7 +4851,7 @@ func (r *rpcServer) extractPaymentIntent(rpcPayReq *rpcPaymentRequest) (rpcPayme
 		}
 
 		// 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 {