README: Fix document link

Author: cyb70289

Diff for: README.md

@@ -17,7 +17,7 @@ This repository hosts the API defintion of the Custom Resource Definitions (CRD)
 
 **NOTE**: All of the APIs are defined under the API group `objectstorage.k8s.io`.
 
-For more information about COSI, visit our [documentation](https://github.com/kubernetes-sigs/container-object-storage-interface-api/blob/master/docs/index.md).
+For more information about COSI, visit our [documentation](https://container-object-storage-interface.github.io/docs).
 ## Developer Guide
 
 All API definitions are in [`apis/objectstorage.k8s.io/`](./apis/objectstorage.k8s.io/). All API changes **_MUST_** satisfy the following requirements: