Updating `HelpController` spec to use an existing image
port of gitlab-org/gitlab-ee!4430, since gitlab-org/gitlab-ee!4323 will be ported to CE the same break will happen on CE
Edited by Mario de la Ossa
port of gitlab-org/gitlab-ee!4430, since gitlab-org/gitlab-ee!4323 will be ported to CE the same break will happen on CE