fix warning

lithomas1 · web-flow · commit c264ebe0c401 · 2024-09-15T16:15:26.000-04:00
diff --git a/doc/source/whatsnew/v2.2.3.rst b/doc/source/whatsnew/v2.2.3.rst
@@ -1,7 +1,7 @@
 .. _whatsnew_223:
 
 What's new in 2.2.3 (September XX, 2024)
----------------------------------------
+----------------------------------------
 
 These are the changes in pandas 2.2.3. See :ref:`release` for a full changelog
 including other versions of pandas.
