Bump serde_yaml from 0.9.21 to 0.9.23 in /packer (#4952)

Summary:
Bumps [serde_yaml](https://github.com/dtolnay/serde-yaml) from 0.9.21 to 0.9.23.
<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>0.9.23</h2>
<ul>
<li>Documentation improvements</li>
</ul>
<h2>0.9.22</h2>
<ul>
<li>Update indexmap dependency to version 2</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="6b212e08b3"><code>6b212e0</code></a> Release 0.9.23</li>
<li><a href="cc83b0a220"><code>cc83b0a</code></a> Opt in to generate-link-to-definition when building on docs.rs</li>
<li><a href="954e38428c"><code>954e384</code></a> Make minimal-versions job consistent with other repos</li>
<li><a href="060eb8669c"><code>060eb86</code></a> Release 0.9.22</li>
<li><a href="b12ad38d63"><code>b12ad38</code></a> Merge pull request <a href="https://redirect.github.com/dtolnay/serde-yaml/issues/377">https://github.com/facebook/flipper/issues/377</a> from dtolnay/indexmap</li>
<li><a href="c418ad56c3"><code>c418ad5</code></a> Update indexmap dependency to version 2</li>
<li><a href="f1cd9e6b7f"><code>f1cd9e6</code></a> Remove .clippy.toml in favor of respecting rust-version from Cargo.toml</li>
<li><a href="147103c4f4"><code>147103c</code></a> Show error details during miri setup in CI</li>
<li><a href="622553f382"><code>622553f</code></a> Fix unused import warnings in test under cfg miri</li>
<li><a href="2037c7e62b"><code>2037c7e</code></a> Fix new unused_mut detected by nightly-2023-04-30</li>
<li>See full diff in <a href="https://github.com/dtolnay/serde-yaml/compare/0.9.21...0.9.23">compare view</a></li>
</ul>
</details>
<br />

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</details>

Pull Request resolved: https://github.com/facebook/flipper/pull/4952

Reviewed By: antonk52

Differential Revision: D47553552

Pulled By: passy

fbshipit-source-id: 2d90115eebe71748270d813e26cea7053e96bdb0

packer/Cargo.toml

@@ -14,7 +14,7 @@ clap = { version = "^3", features = ["derive", "cargo"] }
 shellexpand = "^3"
 tar = "0.4.38"
 serde = { version = "^1", features = ["derive"] }
-serde_yaml = "0.9.21"
+serde_yaml = "0.9.23"
 anyhow = "^1"
 sha2 = "0.10.6"
 data-encoding = "^2"