Update Rust crate syn to v2.0.100 (#12222)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [syn](https://redirect.github.com/dtolnay/syn) |
workspace.dependencies | patch | `2.0.98` -> `2.0.100` |

---

### Release Notes

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

###
[`v2.0.100`](https://redirect.github.com/dtolnay/syn/releases/tag/2.0.100)

[Compare
Source](https://redirect.github.com/dtolnay/syn/compare/2.0.99...2.0.100)

- Add `Visit::visit_token_stream`, `VisitMut::visit_token_stream_mut`,
`Fold::fold_token_stream` for processing TokenStream during syntax tree
traversals
([#&#8203;1852](https://redirect.github.com/dtolnay/syn/issues/1852))

###
[`v2.0.99`](https://redirect.github.com/dtolnay/syn/releases/tag/2.0.99)

[Compare
Source](https://redirect.github.com/dtolnay/syn/compare/2.0.98...2.0.99)

-   Documentation improvements

</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/uv).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4yMDAuMCIsInVwZGF0ZWRJblZlciI6IjM5LjIwMC4wIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJpbnRlcm5hbCJdfQ==-->

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

Cargo.lock

@@ -3792,9 +3792,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.98"
+version = "2.0.100"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "36147f1a48ae0ec2b5b3bc5b537d267457555a10dc06f3dbc8cb11ba3006d3b1"
+checksum = "b09a44accad81e1ba1cd74a32461ba89dee89095ba17b32f5d03683b1b1fc2a0"
 dependencies = [
  "proc-macro2",
  "quote",