Update the NEWS entry

Author: serhiy-storchaka

Misc/NEWS.d/next/Library/2020-05-05-06-05-24.gh-issue-84687.ggjoGl.rst

@@ -1,2 +1,3 @@
 The :func:`os.exec\* <os.execl>` functions now set the
-:attr:`~OSError.filename` attribute of the raised :exc:`FileNotFoundError`.
+:attr:`~OSError.filename` attribute of the raised :exc:`FileNotFoundError`
+or :exc:`NotADirectoryError` to the program name passed by the caller.