Fix heading for AWS Glue entry (#380)

Author: kbatuigas

modules/get-started/pages/whats-new-cloud.adoc

@@ -9,7 +9,7 @@ This page lists new features added to Redpanda Cloud.
 
 == August 2025
 
-== Iceberg topics with AWS Glue
+=== Iceberg topics with AWS Glue
 
 A new xref:manage:iceberg/iceberg-topics-aws-glue.adoc[integration with AWS Glue Data Catalog] allows you to add Redpanda topics as Iceberg tables in your data lakehouse. The AWS Glue catalog integration is available in BYOC clusters with Redpanda version 25.2 and later.