tasks: Downgrade chromium to 93
tasks: Downgrade chromium to 93

94 crashes in at least three different ways, see
https://bugzilla.redhat.com/show_bug.cgi?id=2013095

Downgrade to 93 for the time being. This is not related to Fedora 35,
version 94 entered Fedora 33/34 as well.

cockpit-project/cockpituous,cockpit-project/cockpituous