add upgrade guide

Author: rustagir

source/upgrade.txt

@@ -56,6 +56,15 @@ changes between the current and upgrade versions. For example, if you
 are upgrading the driver from v4.0 to v4.5, address all breaking changes from
 the version after v4.0 including any listed under v4.5.
 
+.. _java-breaking-changes-v5.2:
+
+Version 5.2 Breaking Changes
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+- The driver is no longer compatible with {+mdb-server+} version
+  v3.6. To learn more about this change, see the
+  :ref:`<java-server-release-change-v5.2>` section.
+
 .. _java-breaking-changes-v5.0:
 
 Version 5.0 Breaking Changes
@@ -435,6 +444,16 @@ end-of-life (EOL).
 To learn more about the MongoDB support for EOL products,
 see the `Legacy Support Policy <https://www.mongodb.com/support-policy/legacy>`__.
 
+.. _java-server-release-change-v5.2:
+
+Driver Version 5.2 Server Support Changes
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The v5.2 driver drops support for {+mdb-server+} v3.6.
+To use the v5.2 driver, your {+mdb-server+} must be v4.0 or later. To
+learn how to upgrade your {+mdb-server+} deployment, see
+:manual:`Release Notes </release-notes>` in the {+mdb-server+} manual.
+
 .. _java-server-8.1-incompatibility:
 
 Server Version 8.1 Support Changes