Action fails because of deprecated license_file

[lionel-arnaud-deltatre]

`
error: subprocess-exited-with-error

× Getting requirements to build wheel did not run successfully.
│ exit code: 1
╰─> [62 lines of output]
    running egg_info
    writing lib3/PyYAML.egg-info/PKG-INFO
    writing dependency_links to lib3/PyYAML.egg-info/dependency_links.txt
    writing top-level names to lib3/PyYAML.egg-info/top_level.txt
    /tmp/pip-build-env-yqflmzl_/overlay/lib/python3.8/site-packages/setuptools/config/setupcfg.py:293: _DeprecatedConfig: Deprecated config in `setup.cfg`
    !!
    
            ********************************************************************************
            The license_file parameter is deprecated, use license_files instead.
    
            By 2023-Oct-30, you need to update your project and remove deprecated calls
            or your builds will no longer be supported.
    
            See https://setuptools.pypa.io/en/latest/userguide/declarative_config.html for details.
            ********************************************************************************
    
    !!
      parsed = self.parsers.get(option_name, lambda x: x)(value)
    Traceback (most recent call last):
      File "/usr/local/lib/python3.8/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 353, in <module>
        main()

`