loongson/mirror: links for ascend-langchain

loongson/mirror ascend_langchain-2.0.0.tar.gz
loongson/mirror ascend_langchain-2.0.0-py3-none-any.whl
loongson/mirror ascend_langchain-1.0.0.tar.gz
loongson/mirror ascend_langchain-1.0.0-py3-none-any.whl