DOCSP-40344: v1.13 whats new (#162)

* DOCSP-40344: v1.13 whats new

* remove orphan page

* build error

* JS fixes

* revise to make auth provider more general

(cherry picked from commit 7ba901d)

source/whats-new.txt

@@ -19,6 +19,7 @@ What's New
 
 Learn what's new by version:
 
+* :ref:`Version 1.13 <kafka-connector-whats-new-1.13>`
 * :ref:`Version 1.12 <kafka-connector-whats-new-1.12>`
 * :ref:`Version 1.11.2 <kafka-connector-whats-new-1.11.2>`
 * :ref:`Version 1.11.1 <kafka-connector-whats-new-1.11.1>`
@@ -39,6 +40,22 @@ Learn what's new by version:
 * :ref:`Version 1.1 <kafka-connector-whats-new-1.1>`
 * :ref:`Version 1.0 <kafka-connector-whats-new-1.0>`
 
+.. _kafka-connector-whats-new-1.13:
+
+What's New in 1.13
+------------------
+
+- Added a custom authentication provider interface for Source and Sink
+  Connectors. This feature enables you to write and use a custom implementation
+  class in your connector.
+
+.. TODO add link To learn more, see the :ref:`` guide.
+
+- Fixed an issue that occurred when validating configuration for Source
+  and Sink Connectors if the configuration contained secrets and used
+  the ``Provider`` framework. To learn more about this fix, see the
+  `KAFKA-414 <https://jira.mongodb.org/browse/KAFKA-414>`__ JIRA issue.
+
 .. _kafka-connector-whats-new-1.12:
 
 What's New in 1.12
@@ -240,7 +257,7 @@ Source Connector
 - Added support for the
   :manual:`allow disk use </reference/command/aggregate/#std-label-aggregate-cmd-allowDiskUse>`
   field of the {+query-api+} in the copy existing aggregation with the
-  ``copy.existing.allow.disk.use`` :ref:`configuration property <source-configuration-copy-existing>`
+  ``copy.existing.allow.disk.use`` configuration property
 - Added support for `Avro schema namespaces <https://avro.apache.org/docs/current/spec.html#names>`__
   in the ``output.schema.value`` and ``output.schema.key``
   :ref:`configuration properties <source-configuration-output-format>`