chore(deps): update rust crate syn to v2.0.85 (#475)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [syn](https://redirect.github.com/dtolnay/syn) | workspace.dependencies | patch | `2.0.83` -> `2.0.85` |

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### Release Notes

<details>
<summary>dtolnay/syn (syn)</summary>

### [`v2.0.85`](https://redirect.github.com/dtolnay/syn/compare/2.0.84...2.0.85)

[Compare Source](https://redirect.github.com/dtolnay/syn/compare/2.0.84...2.0.85)

### [`v2.0.84`](https://redirect.github.com/dtolnay/syn/compare/2.0.83...2.0.84)

[Compare Source](https://redirect.github.com/dtolnay/syn/compare/2.0.83...2.0.84)

</details>

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