DOCSP-15570 Support M0, M2 & M5 Atlas clusters as data sources (#145)

Author: kanchana-mongodb

source/deployment/deploy-atlas.txt

@@ -22,8 +22,8 @@ Before you begin, you will need to:
 
 - Create a `MongoDB Atlas <https://www.mongodb.com/cloud/atlas?tck=docs_atlas>`__ 
   account, if you do not have one already.
-- Create an :ref:`M10 <create-cluster-instance>` or higher :ref:`Atlas 
-  Cluster <create-new-cluster>`, if you do not have one already.
+- Create an :ref:`Atlas Cluster <create-new-cluster>`, if you do not 
+  have one already.
 
   .. note::