docs/config/network: mention lima-<NAME>.internal

With `user-v2` network, an instance's IP address is resolvable from
another instance as `lima-<NAME>.internal.`
(e.g., `lima-default.internal.`)

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>

Author: AkihiroSuda

website/content/en/docs/Config/Network/_index.md

@@ -249,6 +249,8 @@ networks:
 {{% /tab %}}
 {{< /tabpane >}}
 
+An instance's IP address is resolvable from another instance as `lima-<NAME>.internal.` (e.g., `lima-default.internal.`).
+
 _Note_
 
 - Enabling this network will disable the [default user-mode network](#user-mode-network--1921685024-)