Invalid dash-separated options for description-file

[wickeat]

Describe the feature you'd like
To rename the description file in

sagemaker-python-sdk/setup.cfg

Line 11 in 57fd632

description-file = README.rst

to description_file.

This is to avoid the setuptools warning of SetuptoolsDeprecationWarning: Invalid dash-separated options, when installing this package. An example of the error is shown below.

      C:\projects\.venv\Lib\site-packages\setuptools\dist.py:745: SetuptoolsDeprecationWarning: Invalid dash-separated options
      !!

              ********************************************************************************
              Usage of dash-separated 'description-file' will not be supported in future
              versions. Please use the underscore name 'description_file' instead.

              This deprecation is overdue, please update your project and remove deprecated
              calls to avoid build errors in the future.

              See https://setuptools.pypa.io/en/latest/userguide/declarative_config.html for details.
              ********************************************************************************

[martinRenou]

Fixed by #4173