README: correct link
if you klick on "https://keys.openpgp.org" you end up at "https://gitlab.com/hagrid-keyserver/hagrid/master/keys.openpgp.org".
this change it ...
if you klick on "https://keys.openpgp.org" you end up at "https://gitlab.com/hagrid-keyserver/hagrid/master/keys.openpgp.org".
this change it ...