Merge branch 'cmarais-add-requirement-for-ldap-sync' into 'master'

Add requirement for config to be added to sidekiq servers

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/159759



Merged-by: Jon Glassman <jglassman@gitlab.com>
Approved-by: Jon Glassman <jglassman@gitlab.com>
Co-authored-by: Charl Marais <cmarais@gitlab.com>

doc/administration/auth/ldap/index.md

@@ -489,6 +489,9 @@ required when `external_groups` is configured:
 | `external_groups` | An array of CNs of groups containing users that should be considered external. Not `cn=interns` or the full DN. | `['interns', 'contractors']` |
 | `sync_ssh_keys`   | The LDAP attribute containing a user's public SSH key. | `'sshPublicKey'` or false if not set |
 
+NOTE:
+If Sidekiq is configured on a different server to the Rails server, you must add the LDAP configuration to every Sidekiq server as well for LDAP synchronisation to work.
+
 ### Use multiple LDAP servers
 
 DETAILS: