CI: Add ruby image for the triage job

9 jobs for master in 1 minute and 45 seconds (queued for 1 second)
Status Job ID Name Coverage
  Triage
failed #168179
triage

00:01:45

manual #168180
allowed to fail manual
triage:dry-run
 
  Test
skipped #168181
flatpak devel
 
  Cross Environment
skipped #168182
fedora rawhide
skipped #168186
flatpak gtk4
skipped #168185
flatpak master
skipped #168184
opensuse tumbleweed
skipped #168183
ubuntu devel
 
  Deploy
skipped #168187
pages
 
Name Stage Failure
failed
triage Triage
	from /usr/local/lib/ruby/2.4.0/psych.rb:325:in `parse'
from /usr/local/lib/ruby/2.4.0/psych.rb:252:in `load'
from /usr/local/lib/ruby/2.4.0/psych.rb:473:in `block in load_file'
from /usr/local/lib/ruby/2.4.0/psych.rb:472:in `open'
from /usr/local/lib/ruby/2.4.0/psych.rb:472:in `load_file'
from /usr/local/bundle/gems/gitlab-triage-0.14.1/bin/gitlab-triage:81:in `<top (required)>'
from /usr/local/bundle/bin/gitlab-triage:23:in `load'
from /usr/local/bundle/bin/gitlab-triage:23:in `<main>'
ERROR: Job failed: exit code 1