loongson/pypi: links for i3-grid

loongson/mirror i3-grid-0.2.3b3.tar.gz
loongson/mirror i3_grid-0.2.3b3-py3-none-any.whl
loongson/mirror i3-grid-0.2.3b2.tar.gz
loongson/mirror i3_grid-0.2.3b2-py3-none-any.whl
loongson/mirror i3-grid-0.2.3b1.tar.gz
loongson/mirror i3_grid-0.2.3b1-py3-none-any.whl