Fix devops empty state illustration

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/133200



Merged-by: Piotr Skorupa <pskorupa@gitlab.com>
Approved-by: Hunter Stewart <hustewart@gitlab.com>
Approved-by: Piotr Skorupa <pskorupa@gitlab.com>
Approved-by: Deepika Guliani <dguliani@gitlab.com>
Approved-by: Enrique Alcántara <ealcantara@gitlab.com>
Co-authored-by: Julia Miocene <jmiocene@gitlab.com>