Add changelog June 29

Author: Blargian

docs/cloud/reference/changelog.md

@@ -31,6 +31,10 @@ import dashboards from '@site/static/images/cloud/reference/may-30-dashboards.pn
 
 In addition to this ClickHouse Cloud changelog, please see the [Cloud Compatibility](/cloud/reference/cloud-compatibility.md) page.
 
+## August 29, 2025 {#august-29-2025}
+
+- [ClickHouse Cloud Azure Private Link](/cloud/security/azure-privatelink) has switched from using Resource GUID to Resource ID filters for resource identification. You can still use the legacy Resource GUID, which is backward-compatibile, but we recommend switching to Resource ID filters. For migration details see the [docs](/cloud/security/azure-privatelink#obtaining-private-endpoint-resourceid) for Azure Private Link.
+
 ## August 22, 2025 {#august-22-2025}
 
 - **ClickHouse Connector for AWS Glue**