Cloud: Add tip for Iceberg object_storage example with BigQuery (#464)

* Add tip for Iceberg object_storage example with BigQuery

* Update local-antora-playbook.yml

Author: kbatuigas

modules/manage/pages/iceberg/rest-catalog/index.adoc

@@ -1,3 +1,5 @@
 = Integrate with REST Catalogs
 :description: Integrate Redpanda topics with managed Iceberg REST Catalogs.
-:page-layout: index
+:page-layout: index
+
+TIP: These guides are for integrating Iceberg topics with managed REST catalogs. Integrating with a REST catalog is recommended for production deployments. If it is not possible to use a REST catalog, you can use the xref:manage:iceberg/use-iceberg-catalogs.adoc#object-storage[filesystem-based catalog]. For an example of using the filesystem-based catalog to access Iceberg topics, see the https://www.redpanda.com/blog/iceberg-topics-redpanda-cloud-byoc-setup[Getting Started with Iceberg Topics on Redpanda BYOC^] blog post.