(DOCSP-14155): adl release notes v20210126 (#121)

* (DOCSP-14155): adl release notes v20210126

* (DOCSP-14155): typo fix

* (DOCSP-14155): add 7324NOW link

Author: jwilliams-mongo

source/includes/changelog/data-lake-2021.rst

@@ -1,3 +1,18 @@
+.. _data-lake-v20210126:
+
+26 January 2021 Release
+~~~~~~~~~~~~~~~~~~~~~~~
+
+- Adds a new :ref:`adl-sql-stage` ``formatVersion`` to reduce the data
+  size of the result set.
+- Improves performance of :ref:`adl-lookup-stage`.
+- Adds ``"verbosity": "queryPlannerExtended"`` support to the
+  :manual:`explain </reference/command/explain>` command to filter out
+  non-matching partitions.
+- Adds support for :manual:`$$NOW
+  </reference/aggregation-variables/#variable.NOW>`.
+- Reports {+adl+} as MongoDB version 4.4 to tools.
+
 .. _data-lake-v20210105:
 
 5 January 2021 Release