Update Rust crate iddqd to 0.3.9 (#2483)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [iddqd](https://redirect.github.com/oxidecomputer/iddqd) |
workspace.dependencies | patch | `0.3.8` -> `0.3.9` |

---

### Release Notes

<details>
<summary>oxidecomputer/iddqd (iddqd)</summary>

###
[`v0.3.9`](https://redirect.github.com/oxidecomputer/iddqd/blob/HEAD/CHANGELOG.md#039---2025-07-21)

[Compare
Source](https://redirect.github.com/oxidecomputer/iddqd/compare/iddqd-0.3.8...iddqd-0.3.9)

##### Added

- For the optional `daft` feature, the map `Diff` types now implement
`fmt::Debug`.

##### Miscellaneous

- Several documentation fixes.

</details>

---

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America/Los_Angeles.

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rebase/retry checkbox.

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---

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Author: nextest-bot

Cargo.lock

@@ -68,7 +68,7 @@ hex = "0.4.3"
 home = "0.5.11"
 http = "1.3.1"
 humantime-serde = "1.1.1"
-iddqd = "0.3.8"
+iddqd = "0.3.9"
 # Disable punycode parsing since we only access well-known domains.
 idna_adapter = "=1.0.0"
 indenter = "0.3.3"