build(deps): Bump syn from 2.0.60 to 2.0.61 (#539)

Bumps [syn](https://github.com/dtolnay/syn) from 2.0.60 to 2.0.61.
<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>2.0.61</h2>
<ul>
<li>Check for legal binding name in the ident of Pat::Ident (<a
href="https://redirect.github.com/dtolnay/syn/issues/1627">#1627</a>)</li>
<li>Resolve unexpected_cfgs warning (<a
href="https://redirect.github.com/dtolnay/syn/issues/1635">#1635</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/dtolnay/syn/commit/e2abd39d334acce72553e0ad9b8c146e9b7732f3"><code>e2abd39</code></a>
Release 2.0.61</li>
<li><a
href="https://github.com/dtolnay/syn/commit/884ac0cb8278489a09acb5883cbebcfdf8bc1c8d"><code>884ac0c</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/syn/issues/1635">#1635</a>
from dtolnay/checkcfg</li>
<li><a
href="https://github.com/dtolnay/syn/commit/05c4cd2bce20c377e3f9a23a541ac4cd4cfa7c28"><code>05c4cd2</code></a>
Resolve unexpected_cfgs warning</li>
<li><a
href="https://github.com/dtolnay/syn/commit/45844d85880376f11bbb22998770363da407e9d5"><code>45844d8</code></a>
Update test suite to nightly-2024-05-01</li>
<li><a
href="https://github.com/dtolnay/syn/commit/79a80eb294fcce8e84eeefbf6989c2a38a2c1dce"><code>79a80eb</code></a>
Update test suite to nightly-2024-04-28</li>
<li><a
href="https://github.com/dtolnay/syn/commit/b70a8e7d975a43e804129b3ef818e90d8545b36d"><code>b70a8e7</code></a>
Update test suite to nightly-2024-04-26</li>
<li><a
href="https://github.com/dtolnay/syn/commit/128b1417e76f44691620981e050e5b48b1dfbb5c"><code>128b141</code></a>
Update test suite to nightly-2024-04-25</li>
<li><a
href="https://github.com/dtolnay/syn/commit/19756f4359bbd897ec6c2ebc0ba52c13f2e8e81f"><code>19756f4</code></a>
Resolve duplicated_attributes clippy lint in test</li>
<li><a
href="https://github.com/dtolnay/syn/commit/76beaff3c102707e3da5eee73e3c2eebf1fa7575"><code>76beaff</code></a>
Raise stack size for tests in debug mode</li>
<li><a
href="https://github.com/dtolnay/syn/commit/a9057f78f6f0e27cd6d17436c2e5564e752c1fa4"><code>a9057f7</code></a>
Update test suite to nightly-2024-04-19</li>
<li>Additional commits viewable in <a
href="https://github.com/dtolnay/syn/compare/2.0.60...2.0.61">compare
view</a></li>
</ul>
</details>
<br />


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