Changes the pipeline illustration from CI/CD Analytics

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/144487



Merged-by: drew stachon <730684-drew@users.noreply.gitlab.com>
Approved-by: Julia Miocene <jmiocene@gitlab.com>
Approved-by: Payton Burdette <pburdette@gitlab.com>
Approved-by: drew stachon <730684-drew@users.noreply.gitlab.com>
Co-authored-by: Jose Ivan Vargas <jvargas@gitlab.com>