Any pipelines that complete successfully for new tags in the subscribed project
will now trigger a pipeline on the current project's default branch. The maximum
number of upstream pipeline subscriptions is defaulted at 2, for both the upstream and
number of upstream pipeline subscriptions is 2 by default, for both the upstream and
downstream projects. This and other [application limits]((https://docs.gitlab.com/ee/administration/instance_limits.html)) are configurable by GitLab administrators.