Update CHANGELOG.md for hashicorp#28110

CHANGELOG.md

@@ -8,6 +8,7 @@ BUG FIXES:
 
 * `azurerm_application_insights_api_key` - fix condition that nil checks the list of available API keys to prevent an indefinate loop when keys created outside of Terraform are present [GH-28037]
 * `azurerm_data_factory_linked_service_azure_sql_database` - send `tenant_id` only if it has been specified [GH-28120]
+* `azurerm_eventgrid_event_subscription` - fix crash when flattening `advanced_filter` [GH-28110]
 * `azurerm_virtual_network_gateway` - fix crash issue when specifying `root_certificate ` or `revoked_certificate` [GH-28099]
 
 ENHANCEMENTS: