fix for expiry date

src/main/java/com/ffii/fpsms/modules/stock/service/StockInLineService.kt

@@ -448,6 +448,7 @@ open class StockInLineService(
             receiptDate = request.receiptDate?.atStartOfDay() ?: LocalDateTime.now()
             // The item label prints this field under 收貨日期.
             productionDate = request.productionDate?.atStartOfDay() ?: receiptDate
+            expiryDate = request.expiryDate ?: expiryDate
             productLotNo = request.productLotNo
             this.type = "NOR"
             status = StockInLineStatus.PENDING.status