allow to download data during tests

[Ivan Kuznetsov]

[Ivan Kuznetsov]

in file pytest.yml

    - name: Download data
      run: |
        # download data is not working now due to https://population.un.org/wpp/Download/... issues unsafe legacy renegotiation disabled
        # chmod +x download_data.sh
        # ./download_data.sh

change to python download_data.py