(fix) update README docs link

Author: f3rno

README.md

@@ -68,7 +68,8 @@ console.log(o.toNewOrderPacket())
 
 ### Docs
 
-[Refer to `docs/model_docs.md`](/docs/model_docs.md) for JSDoc-generated API documentation covering each model class.
+Refer to the [docs/](https://cdn.statically.io/gh/bitfinexcom/bfx-api-node-models/master/docs/index.html)
+folder for JSDoc-generated API documentation covering each model class.
 
 ### Examples