Fix spacing of nesting list items

doc/administration/auth/atlassian.md

doc/administration/auth/oidc.md

doc/administration/backup_restore/backup_archive_process.md

doc/administration/dedicated/configure_instance.md

doc/administration/dedicated/hosted_runners.md

doc/administration/gitaly/praefect.md

doc/administration/gitaly/recovery.md

doc/administration/object_storage.md

doc/administration/operations/filesystem_benchmarking.md

doc/administration/postgresql/database_load_balancing.md

doc/administration/postgresql/external.md

doc/administration/postgresql/multiple_databases.md

doc/administration/postgresql/replication_and_failover.md

doc/administration/raketasks/check.md

doc/administration/settings/scim_setup.md

doc/administration/sidekiq/sidekiq_troubleshooting.md

doc/administration/whats-new.md