Update to appropriate version in docstring

Author: amithkk

pandas/io/parsers/readers.py

@@ -391,7 +391,7 @@
           expected, a ``ParserWarning`` will be emitted while dropping extra elements.
           Only supported when ``engine='python'``
 
-    .. versionchanged:: 1.4.1
+    .. versionchanged:: 2.2.0
 
         - Callable, function with signature
           as described in `pyarrow documentation