Issues CSV export docs

• MR: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/1389
• Link: https://docs.gitlab.com/ee/user/project/issues/csv_export.html

Additions merged: https://gitlab.com/gitlab-org/gitlab-ee/blob/master/doc/user/project/issues/csv_export.md

What needs to be done for the docs to appear at https://docs.gitlab.com/ee/user/project/issues/csv_export.html? Or will this only happen after 9.0 is released?

@jamedjo yep, after 9.0 :)

implemented

closed