Fix broken docs link

What does this MR do?

EE port of https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/24611

Fixes a wrong internal link introduced by https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/24339.

Related issues

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/56754

Author's checklist

• Apply the correct labels and milestone

Review checklist

• Technical writer's review (required)
• Merge the EE-MR first, CE-MR afterwards