loongson/pypi: links for mhtmlconverter

loongson/mirror MHTMLconverter-0.5.tar.gz
loongson/mirror MHTMLconverter-0.4.tar.gz
loongson/mirror MHTMLconverter-0.3.tar.gz
loongson/mirror MHTMLconverter-0.2.tar.gz
loongson/mirror MHTMLconverter-0.2-py3.10.egg
loongson/mirror MHTMLconverter-0.1.tar.gz
loongson/mirror MHTMLconverter-0.1-py3.10.egg