fix toc link

Author: cjgronlund

articles/open-datasets/toc.yml

@@ -17,7 +17,7 @@
   items:
   - name: Python SDK
     displayName: api open datasets reference sdk
-    href: https://aka.ms/open-datasets-api
+    href: /python/api/azureml-opendatasets/azureml.opendatasets?view=azure-ml-py
   - name: Jupyter notebooks
     displayName: python notebooks
     href: https://github.com/Azure/OpenDatasetsNotebooks