Bumps the known_good_semver group with 1 update:
[serde_yaml](https://github.com/dtolnay/serde-yaml).

Updates `serde_yaml` from 0.9.27 to 0.9.30
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/dtolnay/serde-yaml/releases">serde_yaml's
releases</a>.</em></p>
<blockquote>
<h2>0.9.30</h2>
<ul>
<li>Update proc-macro2 to fix caching issue when using a rustc-wrapper
such as sccache</li>
</ul>
<h2>0.9.29</h2>
<ul>
<li>Turn on <code>deny(unsafe_op_in_unsafe_fn)</code> lint</li>
</ul>
<h2>0.9.28</h2>
<ul>
<li>Update <code>unsafe-libyaml</code> dependency to pull in unaligned
write fix</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/dtolnay/serde-yaml/commit/09ee25156f608f95150b27edd120bd5471db3c64"><code>09ee251</code></a>
Release 0.9.30</li>
<li><a
href="https://github.com/dtolnay/serde-yaml/commit/caea939ece85ab54ac41de0672d683905f1e406a"><code>caea939</...