DOCSP-41355 live upgrade updates (#349)

* DOCSP-41355 live upgrade updates

* external review

Author: jmd-mongo

Diff for: source/includes/live-upgrade.rst

@@ -1,4 +1,4 @@
 Starting in ``mongosync`` 1.7.0, you can upgrade ``mongosync`` without
-restarting data synchronization operations from the beginning. You can
-only live upgrade from ``mongosync`` 1.6.0 or later to ``mongosync``
-1.7.0 or later.
+restarting data synchronization operations from the beginning. You can 
+only live upgrade to ``mongosync`` 1.7.3 or later from ``mongosync`` 
+1.7.2 or later.