Update Rust crate serde to v1.0.206 (#577)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [serde](https://serde.rs)
([source](https://togithub.com/serde-rs/serde)) | workspace.dependencies
| patch | `1.0.204` -> `1.0.206` |

---

### Release Notes

<details>
<summary>serde-rs/serde (serde)</summary>

###
[`v1.0.206`](https://togithub.com/serde-rs/serde/releases/tag/v1.0.206)

[Compare
Source](https://togithub.com/serde-rs/serde/compare/v1.0.205...v1.0.206)

- Improve support for `flatten` attribute inside of enums
([#&#8203;2567](https://togithub.com/serde-rs/serde/issues/2567), thanks
[@&#8203;Mingun](https://togithub.com/Mingun))

###
[`v1.0.205`](https://togithub.com/serde-rs/serde/releases/tag/v1.0.205)

[Compare
Source](https://togithub.com/serde-rs/serde/compare/v1.0.204...v1.0.205)

- Use serialize_entry instead of serialize_key + serialize_value when
serialize flattened newtype enum variants
([#&#8203;2785](https://togithub.com/serde-rs/serde/issues/2785), thanks
[@&#8203;Mingun](https://togithub.com/Mingun))
- Avoid triggering a collection_is_never_read lint in the
deserialization of enums containing flattened fields
([#&#8203;2791](https://togithub.com/serde-rs/serde/issues/2791))

</details>

---

### Configuration

📅 **Schedule**: Branch creation - "after 8pm,before 6am" in timezone
America/Los_Angeles, Automerge - "after 8pm,before 6am" in timezone
America/Los_Angeles.

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Renovate
Bot](https://togithub.com/renovatebot/renovate).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOC4yMS4zIiwidXBkYXRlZEluVmVyIjoiMzguMjQuMSIsInRhcmdldEJyYW5jaCI6Im1hc3RlciIsImxhYmVscyI6WyJkZXBlbmRlbmNpZXMiXX0=-->

Co-authored-by: oxide-renovate[bot] <146848827+oxide-renovate[bot]@users.noreply.github.com>