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/
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/