Put a failing spec in quarantine

Signed-off-by: Rémy Coutable <remy@rymai.me>

spec/features/issuables/markdown_references/jira_spec.rb

@@ -1,6 +1,6 @@
 require "rails_helper"
 
-describe "Jira", :js do
+describe "Jira", :js, :quarantine do
   let(:user) { create(:user) }
   let(:actual_project) { create(:project, :public, :repository) }
   let(:merge_request) { create(:merge_request, target_project: actual_project, source_project: actual_project) }