misleading list of stable versions in published package

The README contains the list of stable versions from Zenodo. However, as we use the README as description and this list is not updated when a new release is made, the list is somewhat misleading in the new package:

• https://pypi.org/project/eossr/0.4/
• https://zenodo.org/record/6326454#.YiHMvBPML0o

To solve:

• remove entirely
• state "previous stable versions" in README
• just send to generic zenodo URL: https://zenodo.org/search?page=1&size=20&q=conceptrecid:%225524912%22&sort=-version&all_versions=True