Update README.md

Author: TwoTenPvP

README.md

@@ -5,7 +5,7 @@ MLAPI (Mid level API) is a framework that hopefully simplifies building networke
 To get started, check the [Wiki](https://github.com/TwoTenPvP/MLAPI/wiki).
 This is also where most documentation lies.
 
-There is also a autogenerated Sandcastle [API reference](https://twotenpvp.github.io/MLAPI/docs).
+There is also a autogenerated Sandcastle [API reference](https://twotenpvp.github.io/MLAPI/docs/index.html).
 
 ### Requirements
 * Unity 2017 or newer