loongson/pypi: links for img2jb2pdf

loongson/mirror img2jb2pdf-2023.7.22.0.tar.gz
loongson/mirror img2jb2pdf-2023.7.22.0-py3.10.egg
loongson/mirror img2jb2pdf-2023.7.22.0-py3-none-any.whl