Merge branch 'docs/routing-requirments' into 'master'

Update cells routing service requirements

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/139126



Merged-by: Kamil Trzciński <ayufan@ayufan.eu>
Approved-by: Kamil Trzciński <ayufan@ayufan.eu>
Co-authored-by: Steve Xuereb <sxuereb@gitlab.com>