Merge branch 'doc/update_ocs_with_supported_arch' into 'master'

Add supported architectures section for operational container scanning

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/145592



Merged-by: Russell Dickenson <rdickenson@gitlab.com>
Approved-by: Thiago Figueiró <tfigueiro@gitlab.com>
Co-authored-by: Nick Ilieskou <nilieskou@gitlab.com>