DOCSP-20618-add-link-to-chunk-migration-doc (#614) (#618)

Co-authored-by: jason-price-mongodb <[email protected]>

Co-authored-by: jason-price-mongodb <[email protected]>

Author: jason-price-mongodb

source/tutorial.txt

@@ -70,6 +70,7 @@ Sharding
 - :doc:`/tutorial/convert-replica-set-to-replicated-shard-cluster`
 - :doc:`/tutorial/add-shards-to-shard-cluster`
 - :doc:`/tutorial/remove-shards-from-cluster`
+- :doc:`/tutorial/migrate-chunks-in-sharded-cluster`
 - :doc:`/tutorial/replace-config-server`
 - :doc:`/tutorial/migrate-sharded-cluster-to-new-hardware`
 - :doc:`/tutorial/backup-sharded-cluster-metadata`