Update CHANGELOG.md #24981

CHANGELOG.md

@@ -36,6 +36,7 @@ BUG FIXES:
 * `azurerm_kusto_cluster` - `optimized_auto_scale` is now updated after `sku` has been updated [GH-24906]
 * `azurerm_key_vault_certificate` - will now only update the `lifetime_action` of the certificate block unless otherwise required [GH-24755]
 * `azurerm_linux_virtual_machine_scale_set` - correctly include `public_ip_prefix_id` during updates [GH-24939]
+* `azurerm_postgresql_flexible_server` - the `customer_managed_key.key_vault_key_id` property is now required [GH-24981]
 * `azurerm_nginx_deployment` - changing the `sku` property now creates a new resource [GH-24905]
 * `azurerm_orchestrated_virtual_machine_scale_set` - the `disk_size_gb` and `lun` parameters of `data_disks` are optional now [GH-24944]
 * `azurerm_storage_account` - change order of API calls to be GET-then-PUT ratehr then PATCHES [GH-23935]