Merge pull request #9696 from shanye997/ecs

docs: update alicloud_instance attribute network_interfaces

Author: xuzhang3

website/docs/r/instance.html.markdown

@@ -312,7 +312,7 @@ The data_disks supports the following:
 
 ### `network_interfaces`
 
-The network_interfaces supports the following. Currently only one secondary ENI can be specified.
+The network_interfaces supports the following. 
 
 * `network_interface_id` - (Optional, ForceNew) The ID of the Secondary ENI.
 * `vswitch_id` - (Optional, ForceNew, Available since v1.223.2) The ID of the vSwitch to which to connect Secondary ENI N.