chore(deps): update rust crate syn to v2.0.72 (#488)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [syn](https://togithub.com/dtolnay/syn) | workspace.dependencies |
patch | `2.0.66` -> `2.0.72` |

---

### Release Notes

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

### [`v2.0.72`](https://togithub.com/dtolnay/syn/releases/tag/2.0.72)

[Compare
Source](https://togithub.com/dtolnay/syn/compare/2.0.71...2.0.72)

- Parse `use<'a, T>` precise capturing bounds
([#&#8203;1707](https://togithub.com/dtolnay/syn/issues/1707), thanks
[@&#8203;compiler-errors](https://togithub.com/compiler-errors))

### [`v2.0.71`](https://togithub.com/dtolnay/syn/releases/tag/2.0.71)

[Compare
Source](https://togithub.com/dtolnay/syn/compare/2.0.70...2.0.71)

- Do not require mutable borrow in Punctuated::get()
([#&#8203;1706](https://togithub.com/dtolnay/syn/issues/1706), thanks
[@&#8203;lemunozm](https://togithub.com/lemunozm))

### [`v2.0.70`](https://togithub.com/dtolnay/syn/releases/tag/2.0.70)

[Compare
Source](https://togithub.com/dtolnay/syn/compare/2.0.69...2.0.70)

- Improve parenthesization of closures, jumps, ranges, chained
comparisons, and let
([#&#8203;1694](https://togithub.com/dtolnay/syn/issues/1694),
[#&#8203;1695](https://togithub.com/dtolnay/syn/issues/1695),
[#&#8203;1698](https://togithub.com/dtolnay/syn/issues/1698),
[#&#8203;1699](https://togithub.com/dtolnay/syn/issues/1699),
[#&#8203;1700](https://togithub.com/dtolnay/syn/issues/1700))

### [`v2.0.69`](https://togithub.com/dtolnay/syn/releases/tag/2.0.69)

[Compare
Source](https://togithub.com/dtolnay/syn/compare/2.0.68...2.0.69)

- Correctly parenthesize labeled loops inside a break value
([#&#8203;1692](https://togithub.com/dtolnay/syn/issues/1692))
- Add `Punctuated::get` and `get_mut`
([#&#8203;1693](https://togithub.com/dtolnay/syn/issues/1693))

### [`v2.0.68`](https://togithub.com/dtolnay/syn/releases/tag/2.0.68)

[Compare
Source](https://togithub.com/dtolnay/syn/compare/2.0.67...2.0.68)

- Improve panic location when `parse_quote!` parses invalid syntax
([#&#8203;1690](https://togithub.com/dtolnay/syn/issues/1690), thanks
[@&#8203;stepancheg](https://togithub.com/stepancheg))
- More efficient peek implementation for `Group` and `Lifetime`
([#&#8203;1687](https://togithub.com/dtolnay/syn/issues/1687))

### [`v2.0.67`](https://togithub.com/dtolnay/syn/releases/tag/2.0.67)

[Compare
Source](https://togithub.com/dtolnay/syn/compare/2.0.66...2.0.67)

- Produce more accurate error message locations for errors located at
the end of a nested group
([#&#8203;1679](https://togithub.com/dtolnay/syn/issues/1679),
[#&#8203;1680](https://togithub.com/dtolnay/syn/issues/1680))
- Support peeking `LitCStr` in ParseStream::peek
([#&#8203;1682](https://togithub.com/dtolnay/syn/issues/1682))

</details>

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