docs: correct network create command

Signed-off-by: Shijiang Wei <mountkin@gmail.com>

docs/reference/commandline/network_create.md

@@ -101,7 +101,7 @@ disconnect` command.
 When you create a network, Engine creates a non-overlapping subnetwork for the network by default. This subnetwork is not a subdivision of an existing network. It is purely for ip-addressing purposes. You can override this default and specify subnetwork values directly using the `--subnet` option. On a `bridge` network you can only create a single subnet:
 
 ```bash
-docker network create -d --subnet=192.168.0.0/16
+docker network create --driver=bridge --subnet=192.168.0.0/16 br0
 ```
 Additionally, you also specify the `--gateway` `--ip-range` and `--aux-address` options.