fix error

04:06:29 icaoberg@vm004 ~ → ./papis.sif --help
/usr/local/lib/python3.11/site-packages/isbnlib/registry.py:6: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81
from pkg_resources import iter_entry_points