DOCSP-28526 1.2 release notes clarification (#220) (#226)

* DOCSP-28526 1.2 release notes clarification

* DOCSP-28526 copy edits

Author: ltran-mdb2

source/release-notes/1.2.txt

@@ -17,13 +17,20 @@ Release Notes for ``mongosync`` 1.2
 Migrating Older Versions of MongoDB
 -------------------------------------
 
-Starting in version 1.2, ``mongosync`` can sync between clusters running 
-some older (pre-6.0) releases of MongoDB Server. This feature requires
-additional preparation and configuration in pre-6.0 releases.
+Starting in version 1.2, ``mongosync`` can sync between MongoDB clusters
+(source or destination) with versions lower than 6.0 for one time
+migration onto Atlas. This feature requires additional preparation and
+configuration in clusters with versions lower than 6.0.
 
-If you would like to migrate pre-6.0 versions of MongoDB Server
-using ``mongosync``, please `contact <https://mongodb.com/contact>`__
-your account team to inquire about Professional Services.
+If you would like to use ``mongosync`` to migrate clusters with versions
+of MongoDB lower than 6.0, please `contact
+<https://mongodb.com/contact>`__ your account team to inquire about
+Professional Services.
+
+.. note::
+
+   ``mongosync`` does not support continuous sync between clusters
+   (source or destination) with versions lower than 6.0.
 
 Guardrails for Unsupported Versions of MongoDB
 ----------------------------------------------