Update README.md

Author: abuzuhri

README.md

@@ -68,7 +68,7 @@ Install-Package CSharpAmazonSpAPI
 - [ ] [VendorDirectFulfillmentPaymentsV1](https://developer-docs.amazon.com/sp-api/docs/vendor-direct-fulfillment-payments-api-v1-reference)
 - [ ] [VendorDirectFulfillmentShippingV1](https://developer-docs.amazon.com/sp-api/docs/vendor-direct-fulfillment-shipping-api-v1-reference)
 - [ ] [VendorDirectFulfillmentTransactionsV1](https://developer-docs.amazon.com/sp-api/docs/vendor-direct-fulfillment-transactions-api-v1-reference)
-- [ ] [VendorOrders](https://developer-docs.amazon.com/sp-api/docs/vendor-orders-api-v1-reference)
+- [x] [VendorOrders](https://developer-docs.amazon.com/sp-api/docs/vendor-orders-api-v1-reference)
 - [ ] [vendorInvoices](https://developer-docs.amazon.com/sp-api/docs/vendor-invoices-api-v1-reference)
 - [ ] [VendorShipments](https://developer-docs.amazon.com/sp-api/docs/vendor-shipments-api-v1-reference)
 - [ ] [VendorTransactionStatus](https://developer-docs.amazon.com/sp-api/docs/vendor-transaction-status-api-v1-reference)