Update link to Go contribution guide
DO NOT MERGE BEFORE https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/24661 The page doesn't exist at the moment.
refs #54494
Edited by Philippe Lafoucrière
DO NOT MERGE BEFORE https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/24661 The page doesn't exist at the moment.
refs #54494