OrderApi.md in ultracart_api-3.10.18

- old
+ new

@@ -228,10 +228,10 @@
 
 [ultraCartOauth](../README.md#ultraCartOauth), [ultraCartSimpleApiKey](../README.md#ultraCartSimpleApiKey)
 
 ### HTTP request headers
 
- - **Content-Type**: application/json; charset=UTF-8
+ - **Content-Type**: application/json
  - **Accept**: application/json
 
 # **format**