Merge branch 'doc-cicd_ci_needs_size_limit-0' into 'master'

Clarify what a ci_needs_size_limit of 0 means

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/96597



Merged-by: Marcel Amirault <mamirault@gitlab.com>
Approved-by: Marcel Amirault <mamirault@gitlab.com>
Co-authored-by: Mike Lockhart <mlockhart@gitlab.com>

doc/administration/cicd.md

@@ -69,7 +69,8 @@ can choose a custom limit. For example, to set the limit to `100`:
 Plan.default.actual_limits.update!(ci_needs_size_limit: 100)
 ```
 
-To disable directed acyclic graphs (DAG), set the limit to `0`.
+To disable directed acyclic graphs (DAG), set the limit to `0`. Pipelines with jobs
+configured to use `needs` then return the error `job can only need 0 others`.
 
 ## Change maximum scheduled pipeline frequency