root/pypi: links for duckdb-upgrade

root/pypi duckdb-upgrade-0.2.1.tar.gz
root/pypi duckdb_upgrade-0.2.1-py3-none-any.whl
root/pypi duckdb-upgrade-0.2.0.tar.gz
root/pypi duckdb_upgrade-0.2.0-py3-none-any.whl
root/pypi duckdb_upgrade-0.1.1.tar.gz
root/pypi duckdb_upgrade-0.1.1-py3-none-any.whl