loongson/pypi: links for certifi

INFO: Because this project isn't in the mirror_whitelist, no releases from root/pypi are included.

loongson/pypi certifi-2021.10.8-py2.py3-none-any.whl
loongson/pypi certifi-2021.5.30-py2.py3-none-any.whl
loongson/pypi certifi-2020.12.5-py2.py3-none-any.whl
loongson/pypi certifi-2020.4.5.2-py2.py3-none-any.whl
loongson/pypi certifi-2018.11.29-py2.py3-none-any.whl