fix(deps): update rust crate serde to v1.0.204 (#1289)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [serde](https://serde.rs)
([source](https://togithub.com/serde-rs/serde)) | dependencies | patch |
`1.0.203` -> `1.0.204` |

---

### Release Notes

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

###
[`v1.0.204`](https://togithub.com/serde-rs/serde/releases/tag/v1.0.204)

[Compare
Source](https://togithub.com/serde-rs/serde/compare/v1.0.203...v1.0.204)

- Apply #\[diagnostic::on_unimplemented] attribute on Rust 1.78+ to
suggest adding serde derive or enabling a "serde" feature flag in
dependencies
([#&#8203;2767](https://togithub.com/serde-rs/serde/issues/2767), thanks
[@&#8203;weiznich](https://togithub.com/weiznich))

</details>

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