Depreciated PyPi file name

[JakeWags]

See below warning from PyPi:

In the future, PyPI will require all newly uploaded source distribution filenames to comply with PEP 625. Any source distributions already uploaded will remain in place as-is and do not need to be updated.

Specifically, your recent upload of 'upset-alttxt-0.5.0.tar.gz' is incompatible with PEP 625 because it does not contain the normalized project name 'upset_alttxt'.

In most cases, this can be resolved by upgrading the version of your build tooling to a later version that supports PEP 625 and produces compliant filenames.