Update README.md

Author: abuzuhri

README.md

@@ -248,6 +248,7 @@ var returnMFNOrder = reportManager.GetReturnMFNOrder(90); //GET_FLAT_FILE_RETURN
 var returnFBAOrder = reportManager.GetReturnFBAOrder(90); //GET_FBA_FULFILLMENT_CUSTOMER_RETURNS_DATA
 var reimbursementsOrder = reportManager.GetReimbursementsOrder(180); //GET_FBA_REIMBURSEMENTS_DATA
 var feedbacks = reportManager.GetFeedbackFromDays(180); //GET_SELLER_FEEDBACK_DATA
+var LedgerDetails = reportManager.GetLedgerDetailAsync(10); //GET_LEDGER_DETAIL_VIEW_DATA
 ```