(DOCSP-31172) Adds MongoDB Server support info (#174)

Author: sarahsimpers

source/compatibility.txt

@@ -42,4 +42,26 @@ systems:
      - ``x86-64``, ``ARM``
    * - Ubuntu
      - 18.04, 20.04, 22.04
-     - ``x86-64``, ``ARM``
+     - ``x86-64``, ``ARM``
+
+MongoDB Service Versions
+------------------------
+
+The {+atlas-cli+} supports the following versions of |service| and
+MongoDB server.
+
+.. list-table::
+   :header-rows: 1
+   :widths: 50 50
+
+   * - MongoDB Service
+     - MongoDB Service Version
+   
+   * - |service|
+     - Current
+
+   * - MongoDB server
+     - Any `released and stable version 
+       <https://www.mongodb.com/support-policy/lifecycles>`__ that has
+       not reached its End of Life date. The {+atlas-cli+} doesn't
+       support rapid release MongoDB versions.