dev: bump andrcuns/ruby from 2.6.6-buster-10.6 to 2.6.6-buster-10.6.1 in /spec/fixture/gitlab
requested to merge dependabot-docker-spec-fixture-gitlab-andrcuns-ruby-2.6.6-buster-10.6.1 into master
Bumps andrcuns/ruby from 2.6.6-buster-10.6 to 2.6.6-buster-10.6.1.