(DOCSP-38028): Adds v2.2.0 RNs.

Author: corryroot

source/ak8so-changelog.txt

@@ -19,6 +19,26 @@
    You can find the full list of |ak8so| releases `here
    <https://github.com/mongodb/mongodb-atlas-kubernetes/releases>`_.
 
+.. _ak8so_22:
+
+|ak8so| 2.2.0
+-------------
+
+Fixes
+~~~~~
+
+- Fixes :ref:`Federated Authentication <ak8so-federated-auth>` role 
+  mapping assignment handling.
+
+New
+~~~
+
+- Adds support for ``AP1`` and ``US1-Fed`` Datadog regions. To learn 
+  more, see :ref:`ak8so-integrate-third-party`.
+
+- Adds support for yearly backup frequencies for :ref:`Cloud Backups 
+  <ak8so-backup>`.
+
 .. _ak8so_21:
 
 |ak8so| 2.1.0