Update README.md

README.md

@@ -24,8 +24,7 @@ You will need to get a Courier API key to get started. You can sign up and creat
 v6 of our SDK is automatically generated by [Fern](https://buildwithfern.com/). v6 comes
 with several improvements that we describe below: 
 
-- **Instantiate the client**: There is no longer one global CourierClient, instead you have to 
-  instantiate the client. 
+- **Instantiate the client**: `CourierClient` is now a class and must be instantiated. 
   ```ts
   import { CourierClient } from "@trycourier/courier";