Update Rust crate nbd to 0.3.1 (oxidecomputer#1172)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [nbd](https://togithub.com/vi/rust-nbd) | workspace.dependencies |
patch | `0.3.0` -> `0.3.1` |

---

### Release Notes

<details>
<summary>vi/rust-nbd (nbd)</summary>

### [`v0.3.1`](https://togithub.com/vi/rust-nbd/compare/v0.3.0...v0.3.1)

[Compare
Source](https://togithub.com/vi/rust-nbd/compare/v0.3.0...v0.3.1)

</details>

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Cargo.toml

@@ -61,7 +61,7 @@ indicatif = { version = "0.17.8", features = ["rayon"] }
 itertools = "0.12.1"
 libc = "0.2"
 mime_guess = "2.0.4"
-nbd = "0.3.0"
+nbd = "0.3.1"
 nix = { version = "0.28", features = [ "feature", "uio" ] }
 num_enum = "0.7"
 num-derive = "0.4"