Update Rust crate syn to v2.0.106 (#20070)

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]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.

---

### 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
([#&#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
([#&#8203;1897](https://redirect.github.com/dtolnay/syn/issues/1897))
- Reject polarity modifier and lifetime binder used in the same trait
bound
([#&#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
([#&#8203;1902](https://redirect.github.com/dtolnay/syn/issues/1902))
- Parse bound lifetimes with lifetime bounds
([#&#8203;1903](https://redirect.github.com/dtolnay/syn/issues/1903))
- Allow type parameters and const parameters in trait bounds and generic
closures
([#&#8203;1904](https://redirect.github.com/dtolnay/syn/issues/1904),
[#&#8203;1907](https://redirect.github.com/dtolnay/syn/issues/1907),
[#&#8203;1908](https://redirect.github.com/dtolnay/syn/issues/1908),
[#&#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 {}`
([#&#8203;1881](https://redirect.github.com/dtolnay/syn/issues/1881),
[rust-lang/rust#144386](https://redirect.github.com/rust-lang/rust/pull/144386))

</details>

---

### Configuration

📅 **Schedule**: Branch creation - "before 4am on Monday" (UTC),
Automerge - At any time (no schedule defined).

🚦 **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 was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/astral-sh/ruff).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0MS44Mi43IiwidXBkYXRlZEluVmVyIjoiNDEuODIuNyIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOlsiaW50ZXJuYWwiXX0=-->

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Cargo.lock

@@ -3791,9 +3791,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.104"
+version = "2.0.106"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "17b6f705963418cdb9927482fa304bc562ece2fdd4f616084c50b7023b435a40"
+checksum = "ede7c438028d4436d71104916910f5bb611972c5cfd7f89b8300a8186e6fada6"
 dependencies = [
  "proc-macro2",
  "quote",