loongson/mirror: links for vcf-merger

loongson/mirror vcf_merger-2025.12.31.tar.gz
loongson/mirror vcf_merger-2025.12.31-py3-none-any.whl
loongson/mirror vcf_merger-2025.12.7.post2.tar.gz
loongson/mirror vcf_merger-2025.12.7.post2-py3-none-any.whl