Fix missing Glossary link
On https://docs.gitlab.com/ce/university/ Git and GitLab Terminology "Glossary" incorrectly points to https://docs.gitlab.com/glossary/ instead of https://docs.gitlab.com/ce/university/glossary/
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
On https://docs.gitlab.com/ce/university/ Git and GitLab Terminology "Glossary" incorrectly points to https://docs.gitlab.com/glossary/ instead of https://docs.gitlab.com/ce/university/glossary/