Bumps the known_good_semver group with 1 update:
[syn](https://github.com/dtolnay/syn).

<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>2.0.36</h2>
<ul>
<li>Restore compatibility with
<code>--generate-link-to-definition</code> documentation builds (<a
href="https://redirect.github.com/dtolnay/syn/issues/1514">#1514</a>)</li>
</ul>
<h2>2.0.35</h2>
<ul>
<li>Make rust-analyzer produce preferred brackets for invocations of
<code>Token!</code> macro (<a
href="https://redirect.github.com/dtolnay/syn/issues/1510">#1510</a>, <a
href="https://redirect.github.com/dtolnay/syn/issues/1512">#1512</a>)</li>
</ul>
<h2>2.0.34</h2>
<ul>
<li>Documentation improvements</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/dtolnay/syn/commit/ef6476c76431da488720c8ee3fdfff57a199a848"><code>ef6476c</code></a>
Release 2.0.36</li>
<li><a
href="https://github.com/dtolnay/syn/commit/6ae1a9756a128f18341a4cba56772ee1715a06e2"><code>6ae1a97</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/syn/issues/1514">#1514</a>
from dtolnay/pubnotdoc</li>
<li><a
href="https://github.com/dtolnay/syn/commit/7bfef4b2befee954bc002724c8331612fed3d47f"><code>7bfef4b</code></a>
Work around doc breakage in generate-link-to-definition mode</li>
<li><a
href="https://github.com/dtolnay/syn/commit/ce360ff4b1695311dcc569ade1fc9ff1ff6ac4d9"><code>ce360ff</code></a>
Release 2.0.35</li>
<li><a
href="https://github.com/dtolnay/syn/commit/23736bdc48a964286ea032ea5c172574239119ef"><code>23736bd</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/syn/issues/1512">#1512</a>
from dtolnay/tokendoc</li>
<li><a
href="https://github.com/dtolnay/syn/commit/6f6b0040d420abfda0b5504dc13b7c76319ebccd"><code>6f6b004</code></a>
Improve docs of Token! macro</li>
<li><a
href="https://github.com/dtolnay/syn/commit/319433e12a0e13d1b549a189ae1ce1d3293a7ea9"><code>319433e</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/syn/issues/1510">#1510</a>
from ModProg/patch-3</li>
<li><a
href="https://github.com/dtolnay/syn/commit/975ce0b7c4319166ff0ae5ea839d923410615dae"><code>975ce0b</code></a>
Release 2.0.34</li>
<li><a
href="https://github.com/dtolnay/syn/commit/858e578d1e3aed3d7ac965a59b5044a1ca4eadf2"><code>858e578</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/syn/issues/1511">#1511</a>
from dtolnay/notdoc</li>
<li><a
href="https://github.com/dtolnay/syn/commit/1b0d7f807862cb36256848a9f55a81a9aca41976"><code>1b0d7f8</code></a>
Add cfg(not(doc)) to doc(hidden) functions</li>
<li>Additional commits viewable in <a
href="https://github.com/dtolnay/syn/compare/2.0.33...2.0.36">compare
view</a></li>
</ul>
</details>
<br />


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* pallet-bridge-beefy: initial commit