Expose k8s tutorial to docs (#6596)

docs/readthedocs/source/_toc.yml

@@ -60,6 +60,7 @@ subtrees:
             subtrees:
               - entries:
                 - file: doc/Orca/Tutorial/yarn
+                - file: doc/Orca/Tutorial/k8s
           - file: doc/Orca/Overview/known_issues
             title: "Tips and Known Issues"
           - file: doc/PythonAPI/Orca/index

docs/readthedocs/source/doc/Orca/Tutorial/index.rst

@@ -2,5 +2,6 @@ Orca Tutorials
 =================================
 
 * `Run on Hadoop/YARN clusters <yarn.html>`_
+* `Run on Kubernetes clusters <k8s.html>`_
 * `Run on Azure Databricks <../../UserGuide/databricks.html>`_
 * `Run on Google Colab <../../UserGuide/colab.html>`_

docs/readthedocs/source/doc/Orca/index.rst

@@ -31,7 +31,7 @@ Most AI projects start with a Python notebook running on a single laptop; howeve
         +++
 
         :bdg-link:`Quickstarts <./QuickStart/index.html>` |
-        :bdg-link:`Hadoop/YARN <./Tutorial/yarn.html>`
+        :bdg-link:`Tutorials <./Tutorial/index.html>`
 
     .. grid-item-card::