Fix link for v1alpha3 Katib SDK (#2142)

* Fix link for v1alpha3 Katib SDK

* Update Katib owners

Author: andreyvelich

content/en/docs/components/hyperparameter-tuning/OWNERS

@@ -2,3 +2,4 @@ approvers:
   - andreyvelich
   - gaocegege
   - johnugeorge
+  - sperlingxx

content/en/docs/components/hyperparameter-tuning/overview.md

@@ -122,7 +122,7 @@ You can use the following interfaces to interact with Katib:
     Kubeflow cluster. Read about kubectl in the [Kubernetes 
     documentation](https://kubernetes.io/docs/tasks/tools/install-kubectl/).
 
-* Katib SDK. See the [Katib SDK documentation on GitHub](https://github.com/kubeflow/katib/tree/master/sdk/python).
+* Katib SDK. See the [Katib SDK documentation on GitHub](https://github.com/kubeflow/katib/tree/master/sdk/python/v1alpha3).
 
 ## Katib concepts