This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [syn](https://redirect.github.com/dtolnay/syn) |
workspace.dependencies | patch | `2.0.104` -> `2.0.106` |

---

> [!WARNING]
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### Release Notes

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

###
[`v2.0.106`](https://redirect.github.com/dtolnay/syn/releases/tag/2.0.106)

[Compare
Source](https://redirect.github.com/dtolnay/syn/compare/2.0.105...2.0.106)

- Replace `~const` syntax with `[const]` conditionally const syntax in
trait bounds
([#&astral-sh#8203;1896](https://redirect.github.com/dtolnay/syn/issues/1896),
[rust-lang/rust#139858](https://redirect.github.com/rust-lang/rust/pull/139858))
- Support conditionally const impl Trait types
([#&astral-sh#8203;1897](https://redirect.github.com/dtolnay/syn/issues/1897))
- Reject polarity modifier and lifetime binder used in the same trait
bound
([#&astral-sh#8203;1899](https://redirect.github.com/dtolnay/syn/issues/1899),
[rust-lang/rust#127054](https://redirect.github.com/rust-lang/rust/pull/127054))
- Parse const trait bounds with bound lifetimes
([#&astral-sh#8203;1902](https://redirect.github.com/dtolnay/syn/issues/1902))
- Parse bound lifetimes with lifetime bounds
([#&astral-sh#8203;1903](https://redirect.github.com/dtolnay/syn/issues/1903))
- Allow type parameters and const parameters in trait bounds and generic
closures
([#&astral-sh#8203;1904](https://redirect.github.com/dtolnay/syn/issues/1904),
[#&astral-sh#8203;1907](https://redirect.github.com/dtolnay/syn/issues/1907),
[#&astral-sh#8203;1908](https://redirect.github.com/dtolnay/syn/issues/1908),
[#&astral-sh#8203;1909](https://redirect.github.com/dtolnay/syn/issues/1909))

###
[`v2.0.105`](https://redirect.github.com/dtolnay/syn/releases/tag/2.0.105)

[Compare
Source](https://redirect.github.com/dtolnay/syn/compare/2.0.104...2.0.105)

- Disallow "negative" inherent impls like `impl !T {}`
([#&astral-sh#8203;1881](https://redirect.github.com/dtolnay/syn/issues/1881),
[rust-lang/rust#144386](https://redirect.github.com/rust-lang/rust/pull/144386))

</details>

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