build(deps): Bump syn from 2.0.82 to 2.0.85 (#606)

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[//]: # (dependabot-end)

Bumps [syn](https://github.com/dtolnay/syn) from 2.0.82 to 2.0.85.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/dtolnay/syn/releases">syn's
releases</a>.</em></p>
<blockquote>
<h2>2.0.85</h2>
<ul>
<li>Preserve extern static unsafety in ForeignItem::Verbatim (<a
href="https://redirect.github.com/dtolnay/syn/issues/1773">#1773</a>)</li>
</ul>
<h2>2.0.84</h2>
<ul>
<li>Parse safe and explicitly unsafe extern items (<a
href="https://redirect.github.com/dtolnay/syn/issues/1768">#1768</a>, <a
href="https://redirect.github.com/rust-lang/rust/issues/123743">rust-lang/rust#123743</a>,
<a
href="https://redirect.github.com/rust-lang/rfcs/pull/3484">rust-lang/rfcs#3484</a>)</li>
<li>Parse self captures: <code>impl Sized + use&lt;Self&gt;</code> (<a
href="https://redirect.github.com/dtolnay/syn/issues/1772">#1772</a>)</li>
</ul>
<h2>2.0.83</h2>
<ul>
<li>Documentation improvements</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/dtolnay/syn/commit/293d7c9f54e78bdd40d86413c839f9ba60f81376"><code>293d7c9</code></a>
Release 2.0.85</li>
<li><a
href="https://github.com/dtolnay/syn/commit/c94df74b400a118e90656c15414c78a68e07b567"><code>c94df74</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/syn/issues/1773">#1773</a>
from dtolnay/unsafestatic</li>
<li><a
href="https://github.com/dtolnay/syn/commit/8d7814a89f9ec7147822a17c9cf3b59e164705e2"><code>8d7814a</code></a>
Preserve extern static unsafety in ForeignItem::Verbatim</li>
<li><a
href="https://github.com/dtolnay/syn/commit/2e159bc35385dc544778b00bb2969608fcad759b"><code>2e159bc</code></a>
Release 2.0.84</li>
<li><a
href="https://github.com/dtolnay/syn/commit/058e7d0dacb5811623fe1fabb7927daf208c1c6d"><code>058e7d0</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/syn/issues/1772">#1772</a>
from dtolnay/selfcapture</li>
<li><a
href="https://github.com/dtolnay/syn/commit/2a9e9fbd21df38dda22ad6683d2524842d16160b"><code>2a9e9fb</code></a>
Parse self captures: <code>impl Sized + use\&lt;Self&gt;</code></li>
<li><a
href="https://github.com/dtolnay/syn/commit/e478e03f8edcf2934b39f42e2ffd9dbe3f49acae"><code>e478e03</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/syn/issues/1771">#1771</a>
from dtolnay/up</li>
<li><a
href="https://github.com/dtolnay/syn/commit/19baaa61efd24eb1a29acbc91d5383a7054e87b4"><code>19baaa6</code></a>
Categorize newly failing rust repo source files</li>
<li><a
href="https://github.com/dtolnay/syn/commit/f89eca23006ec79e862992ece8702e9e5b44f63a"><code>f89eca2</code></a>
Update test suite to nightly-2024-10-23</li>
<li><a
href="https://github.com/dtolnay/syn/commit/83e3b08a1f4b15c9a03d82856bee7536aa006dc4"><code>83e3b08</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/syn/issues/1768">#1768</a>
from dtolnay/safe</li>
<li>Additional commits viewable in <a
href="https://github.com/dtolnay/syn/compare/2.0.82...2.0.85">compare
view</a></li>
</ul>
</details>
<br />


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