DOC: Feeds: malwaredomains: change URL
DOC: Feeds: malwaredomains: change URL

mirror2 is offline, use mirror1
fixes certtools/intelmq#1018

aaronkaplan/intelmq,aaronkaplan/intelmq,certtools/intelmq,aaronkaplan/intelmq,certtools/intelmq,certtools/intelmq