Update deprecated tag

[bkmgit]

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      Usage of dash-separated 'description-file' will not be supported in future
      versions. Please use the underscore name 'description_file' instead.
      (Affected: tlv8).
      Available configuration options are listed in:
      https://setuptools.pypa.io/en/latest/userguide/declarative_config.html
      This deprecation is overdue, please update your project and remove deprecated
      calls to avoid build errors in the future.
      See https://github.com/pypa/setuptools/discussions/5011 for details.
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