loongson/pypi: links for unitrain

loongson/mirror UniTrain-0.2.4.tar.gz
loongson/mirror UniTrain-0.2.4-py3-none-any.whl
loongson/mirror UniTrain-0.2.2.tar.gz
loongson/mirror UniTrain-0.2.2-py3-none-any.whl