Docs: updated configuration description for auto_assign_org (#50180)

* Docs: updated configuration description for auto_assign_org

* Update docs/sources/setup-grafana/configure-grafana/_index.md

* Resolve prettier issues for CI

* Update docs/sources/setup-grafana/configure-grafana/_index.md

Remove trailing space

Co-authored-by: Garrett Guillotte <100453168+gguillotte-grafana@users.noreply.github.com>
Co-authored-by: Garrett Guillotte <garrett.guillotte@grafana.com>
Co-authored-by: Ursula Kallio <ursula.kallio@grafana.com>

docs/sources/setup-grafana/configure-grafana/_index.md

@@ -683,7 +683,8 @@ Default is `false`.
 
 Set to `true` to automatically add new users to the main organization
 (id 1). When set to `false`, new users automatically cause a new
-organization to be created for that new user. Default is `true`.
+organization to be created for that new user. The organization will be
+created even if the `allow_org_create` setting is set to `false`. Default is `true`.
 
 ### auto_assign_org_id