Merge branch 'sh-fix-default-config' into 'master'

Fix default config: RemoteMirrors -> RemoteMirrorsProber

See merge request gitlab-org/gitlab-monitor!96
2 jobs for master in 55 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #4476418
rspec

00:00:54

passed #4476419
rubocop

00:00:53