OSDOCS-8034 Adding an overview of the security groups configuration to the what's new doc

Author: laubai

rosa_release_notes/rosa-release-notes.adoc

@@ -16,6 +16,8 @@ toc::[]
 [id="rosa-q4-2023_{context}"]
 === Q4 2023
 
+* **Configure custom security groups.** With the release of ROSA CLI (`rosa`) version 1.2.31, administrators can use the `rosa create cluster` and `rosa create machinepool` commands to configure a new cluster or a new machine pool with up to 5 additional custom security groups. Additionally, administrators can create a new machine pool with up to 5 additional custom security groups by using OpenShift Cluster Manager. Configuring custom security groups gives administrators greater control over resource access in new clusters and machine pools. For more information, see xref:../rosa_install_access_delete_clusters/rosa_getting_started_iam/rosa-aws-prereqs.adoc#rosa-security-groups_prerequisites[Security groups].
+
 * **ROSA CLI update.** The ROSA CLI (`rosa`) was updated to a new version. For information about what has changed in this release, see the link:https://github.com/openshift/rosa/releases/tag/v1.2.29[ROSA CLI release notes]. For more information about the ROSA CLI (`rosa`), see xref:../cli_reference/rosa_cli/rosa-get-started-cli.adoc#rosa-about_rosa-getting-started-cli[About the ROSA CLI].
 
 * **Command update.** With the release of ROSA CLI (`rosa`) version 1.2.28, a new command, `rosa describe machinepool`, was added that allows you to check detailed information regarding a specific ROSA cluster machine pool. For more information, see xref:../cli_reference/rosa_cli/rosa-manage-objects-cli.adoc#rosa-describe-machinepool_rosa-managing-objects-cli[describe machinepool].