loongson/pypi: links for retake-pgsync

loongson/mirror retake-pgsync-2.5.4.tar.gz
loongson/mirror retake_pgsync-2.5.4-py3-none-any.whl
loongson/mirror retake-pgsync-2.5.3.tar.gz
loongson/mirror retake_pgsync-2.5.3-py3-none-any.whl
loongson/mirror retake-pgsync-2.5.2.tar.gz
loongson/mirror retake_pgsync-2.5.2-py3-none-any.whl
loongson/mirror retake-pgsync-2.5.1.tar.gz
loongson/mirror retake_pgsync-2.5.1-py3-none-any.whl