Fix editing multiple orders by orderId

[rxmp]

No description provided.

[JKorf]

Hi, what was the issue with this? According to the docs it should be a long, not a string

[rxmp]

Hello, the API returns 200 OK and does not actually do anything.
When I tried doing it using their postman collections in the same way, it returned missing orderId error.
Replacing long value with string worked.
Also the EditOrderAsync method uses string and works fine.

[JKorf]

Ah, you're right; I validated your fix works. Thanks!