[Bug] Documentation: Custom proxy configuration example missing "network" wrapper block

Question

**Bug Description**
Hi! I found a tiny bug in the Claude Code documentation. [This section](https://docs.claude.com/en/docs/claude-code/sandboxing#custom-proxy-configuration) references the following example sandbox settings:

```
{
  "sandbox": {
    "httpProxyPort": 8080,
    "socksProxyPort": 8081,
  }
}
```

This example is missing the intermediary `"network"` block.

```
{
  "sandbox": {
    "network": {
      "httpProxyPort": 8080,
      "socksProxyPort": 8081
    }
}
```