loongson/pypi: links for onnxruntime

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

loongson/pypi onnxruntime-1.15.1-cp39-cp39-linux_loongarch64.whl
loongson/pypi onnxruntime-1.15.1-cp38-cp38-linux_loongarch64.whl
loongson/pypi onnxruntime-1.15.1-cp37-cp37m-linux_loongarch64.whl