Merge branch 'docs-lp-rca-2-duo-chat-458239' into 'master'

Docs for RCA in Duo Chat

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/158850



Merged-by: Marcel Amirault <mamirault@gitlab.com>
Approved-by: Allison Browne <abrowne@gitlab.com>
Co-authored-by: Allison Browne <abrowne@gitlab.com>
Co-authored-by: Lysanne Pinto <lpinto@gitlab.com>