loongson/pypi: links for sentencepiece

loongson/pypi sentencepiece-0.2.0-cp38-cp38-manylinux_2_28_loongarch64.whl
loongson/pypi sentencepiece-0.1.99-cp38-cp38-linux_loongarch64.whl
loongson/pypi sentencepiece-0.1.99-cp310-cp310-linux_loongarch64.whl
loongson/pypi sentencepiece-0.1.97-cp37-cp37m-linux_loongarch64.whl