Update whatsnew entry

Author: avinashpancham

doc/source/whatsnew/v1.2.0.rst

@@ -624,7 +624,7 @@ I/O
 - Bug in :func:`read_html` was raising a ``TypeError`` when supplying a ``pathlib.Path`` argument to the ``io`` parameter (:issue:`37705`)
 - :meth:`to_excel` and :meth:`to_markdown` support writing to fsspec URLs such as S3 and Google Cloud Storage (:issue:`33987`)
 - Bug in :meth:`read_fw` was not skipping blank lines (even with ``skip_blank_lines=True``) (:issue:`37758`)
-- Parse missing values using :func:`read_json` with ``dtype=False`` to NaN instead of None (:issue:`28501`)
+- Parse missing values using :func:`read_json` with ``dtype=False`` to ``NaN`` instead of ``None`` (:issue:`28501`)
 
 Plotting
 ^^^^^^^^