DOCS-15884 1.2 release notes (#110)

* DOCS-15884 Release Notes for mongosync 1.2.0

* Adds 1.2 to release notes

* Adds unsupported warning

* Fixes per Joe and Dave

* Updates release date

* Fixes per Dave Rolsky

* Fixes per Dave Rolsky

* Fixes per Alan

Author: kennethdyer

source/release-notes.txt

@@ -11,4 +11,5 @@ Release Notes
    /release-notes/0.9
    /release-notes/1.0
    /release-notes/1.1
+   /release-notes/1.2
 

source/release-notes/1.2.txt

@@ -0,0 +1,43 @@
+.. _c2c-release-notes-1.1:
+
+===================================
+Release Notes for ``mongosync`` 1.2
+===================================
+
+.. default-domain:: mongodb
+
+.. contents:: On this page
+   :local:
+   :backlinks: none
+   :depth: 1
+   :class: singlecol
+
+.. note::
+
+   ``mongosync`` 1.2 Released February 16, 2023
+
+
+Migrating Older Versions of MongoDB
+-------------------------------------
+
+``mongosync`` 1.2 can sync between clusters running 
+older (pre-6.0) releases of MongoDB Server.  Use of this feature
+requires additional preparation and configuration.
+
+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.
+
+
+Guardrails for Unsupported Versions of MongoDB
+----------------------------------------------
+
+``mongosync`` now returns an error if you call :ref:`c2c-api-start`
+to sync clusters running unsupported releases of MongoDB Server.
+
+
+Collated Collections Issue
+---------------------------
+
+Fixes bug that could cause ``mongosync`` to crash when replicating
+collated collections.