Update whatsnew v1.4.1

Author: Daniel O'Brien

doc/source/whatsnew/v1.4.1.rst

@@ -18,7 +18,7 @@ Fixed regressions
 - Regression in :func:`.assert_frame_equal` not respecting ``check_flags=False`` (:issue:`45554`)
 - Regression in :meth:`Series.fillna` with ``downcast=False`` incorrectly downcasting ``object`` dtype (:issue:`45603`)
 - Regression in :meth:`DataFrame.loc.__setitem__` losing :class:`Index` name if :class:`DataFrame` was empty before (:issue:`45621`)
--
+- Regression in :func:`pandasSQL_builder` whereby `sqlalchemy` was incorrectly required as a dependency for DBAPI2 connection objects that aren't from `sqlite3` or `sqlalchemy`  (:issue:`45660`)
 
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