Backport PR #57759 on branch 2.2.x (DOC: add whatsnew for v2.2.2) (#57763)

* Backport PR #57759: DOC: add whatsnew for v2.2.2

* [skip-ci]

---------

Co-authored-by: Marco Edward Gorelli <[email protected]>
Co-authored-by: Marco Gorelli <[email protected]>

Author: meeseeksmachine

Diff for: doc/source/whatsnew/index.rst

@@ -16,6 +16,7 @@ Version 2.2
 .. toctree::
    :maxdepth: 2
 
+   v2.2.2
    v2.2.1
    v2.2.0
 

Diff for: doc/source/whatsnew/v2.2.2.rst

@@ -0,0 +1,36 @@
+.. _whatsnew_222:
+
+What's new in 2.2.2 (April XX, 2024)
+---------------------------------------
+
+These are the changes in pandas 2.2.2. See :ref:`release` for a full changelog
+including other versions of pandas.
+
+{{ header }}
+
+.. ---------------------------------------------------------------------------
+.. _whatsnew_222.regressions:
+
+Fixed regressions
+~~~~~~~~~~~~~~~~~
+-
+
+.. ---------------------------------------------------------------------------
+.. _whatsnew_222.bug_fixes:
+
+Bug fixes
+~~~~~~~~~
+-
+
+.. ---------------------------------------------------------------------------
+.. _whatsnew_222.other:
+
+Other
+~~~~~
+-
+
+.. ---------------------------------------------------------------------------
+.. _whatsnew_222.contributors:
+
+Contributors
+~~~~~~~~~~~~