Update index.rst -add link to the University course

docs/source/index.rst

@@ -30,7 +30,7 @@ The Scylla operator manages Scylla clusters deployed to Kubernetes and automates
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-For the latest status of the project, and reports issue, see the Github Project. Also check out the K8s Operator lesson on Scylla University.
+For the latest status of the project, and reports issue, see the Github Project. Also check out the `K8s Operator lesson on Scylla University <https://university.scylladb.com/courses/scylla-operations/lessons/kubernetes-operator/topic/k8-operator-what-is-the-scylla-operator/>`_.
 
 scylla-operator is a Kubernetes Operator for managing Scylla clusters.