Backport PR pandas-dev#56947: DOC: Set date for 2.2

lithomas1 · meeseeksmachine · commit 9b45d56d8d62 · 2024-01-19T01:50:59.000Z
diff --git a/doc/source/whatsnew/v2.2.0.rst b/doc/source/whatsnew/v2.2.0.rst
@@ -1,6 +1,6 @@
 .. _whatsnew_220:
 
-What's new in 2.2.0 (January XX, 2024)
+What's new in 2.2.0 (January 19, 2024)
 --------------------------------------
 
 These are the changes in pandas 2.2.0. See :ref:`release` for a full changelog
