docs: Fix wrong bridge driver option

[pn11]

- What I did

Fixed a wrong bridge driver option for docker network create.

- How I did it

Fixed documentation.

- How to verify it

With the option in current documentation, the name of the interface in a container remains unchanged (eth0).

$ docker network create -d bridge --opt com.docker.network.container_interface_prefix=moby my-bridge
a6de36dff4b47db04bfd0ce72115d6a071401f82be653cfdd2ee4b805ba2c22a

$ docker run -it --network=my-bridge alpine ip link show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
257425: eth0@if257426: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1500 qdisc noqueue state UP
    link/ether 02:42:c0:a8:30:02 brd ff:ff:ff:ff:ff:ff

With com.docker.network.container_iface_prefix, it works perfectly.

$ docker network create -d bridge --opt com.docker.network.container_iface_prefix=moby my-bridge
ca7448ba52d293a34ca1a1336c54f654c9cd5d5abe17b3d86c0de2f71291440f

$ docker run -it --network=my-bridge alpine ip link show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
257428: moby0@if257429: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1500 qdisc noqueue state UP
    link/ether 02:42:c0:a8:40:02 brd ff:ff:ff:ff:ff:ff

- Description for the changelog

N/A

- A picture of a cute animal (not mandatory but encouraged)

This is Pui Pui Molcar, a stop-motion anime featuring Molmots, booming in Japan. (@molcar_anime)

[thaJeztah]

LGTM, thanks!

[thaJeztah]

Hmmm.. good catch; looks indeed the correct name; https://github.com/moby/moby/blob/a8a769f04f7ae44117772943ef0f4607b54e05ff/vendor/github.com/docker/libnetwork/netlabel/labels.go#L54-L55

// ContainerIfacePrefix can be used to override the interface prefix used inside the container
ContainerIfacePrefix = Prefix + ".container_iface_prefix"

Looks like moby/moby#31811 updated the changelog incorrectly, probably because the title of the libnetwork pull request had the wrong name in it (I just fixed that); moby/libnetwork#1667

[thaJeztah]

opened moby/moby#42446 and docker/docs#12921 to fix the changelog entry