Bump serde_yaml from 0.9.25 to 0.9.30 in /packer (#5395)

Summary:
Bumps [serde_yaml](https://github.com/dtolnay/serde-yaml) from 0.9.25 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>
<h2>0.9.27</h2>
<ul>
<li>Always serialize serde_yaml::Number containing NaN as a positive NaN (<a href="https://redirect.github.com/dtolnay/serde-yaml/issues/394">https://github.com/facebook/flipper/issues/394</a>)</li>
</ul>
<h2>0.9.26</h2>
<ul>
<li>Guarantee that <code>.nan</code> is deserialized as a positive NaN (<a href="https://redirect.github.com/dtolnay/serde-yaml/issues/392">https://github.com/facebook/flipper/issues/392</a>, <a href="https://redirect.github.com/dtolnay/serde-yaml/issues/393">https://github.com/facebook/flipper/issues/393</a>)</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</code></a> Pull in proc-macro2 sccache fix</li>
<li><a href="https://github.com/dtolnay/serde-yaml/commit/d255918c141fd72d01f169bb5aa0152234981699"><code>d255918</code></a> Merge pull request <a href="https://redirect.github.com/dtolnay/serde-yaml/issues/403">https://github.com/facebook/flipper/issues/403</a> from dtolnay/optionifletelse</li>
<li><a href="https://github.com/dtolnay/serde-yaml/commit/8cfeedd766f83dab24d03b9fb11b72886a247425"><code>8cfeedd</code></a> Remove option_if_let_else clippy suppression</li>
<li><a href="https://github.com/dtolnay/serde-yaml/commit/b957d2b15d7f3d96279997800fa0610b41b8fe00"><code>b957d2b</code></a> Release 0.9.29</li>
<li><a href="https://github.com/dtolnay/serde-yaml/commit/007fc2d5c1987847a0f1ac95885c56f8e6e5f808"><code>007fc2d</code></a> Merge pull request <a href="https://redirect.github.com/dtolnay/serde-yaml/issues/401">https://github.com/facebook/flipper/issues/401</a> from dtolnay/unsafeop</li>
<li><a href="https://github.com/dtolnay/serde-yaml/commit/5bac2475b0017d6a635d641df17165d71b951f0e"><code>5bac247</code></a> Fill in unsafe blocks inside unsafe functions</li>
<li><a href="https://github.com/dtolnay/serde-yaml/commit/0f6dba18ab8db598c4963e9242afd490ee0202f0"><code>0f6dba1</code></a> Turn on deny(unsafe_op_in_unsafe_fn)</li>
<li><a href="https://github.com/dtolnay/serde-yaml/commit/1b6e44837f0db0a1c15537311fed3579a7e8c6d2"><code>1b6e448</code></a> Release 0.9.28</li>
<li><a href="https://github.com/dtolnay/serde-yaml/commit/ec1a3145d7b6b809f7b3aa2d9dcd7db30f0588d4"><code>ec1a314</code></a> Force unsafe-libyaml version that contains unaligned write fix</li>
<li>Additional commits viewable in <a href="https://github.com/dtolnay/serde-yaml/compare/0.9.25...0.9.30">compare view</a></li>
</ul>
</details>
<br />

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</details>

Pull Request resolved: #5395

Reviewed By: antonk52

Differential Revision: D52512725

Pulled By: passy

fbshipit-source-id: 3e1cbe037ca0f3a486f10d3a751f443e35232b92

packer/Cargo.toml

@@ -14,7 +14,7 @@ clap = { version = "^3", features = ["derive", "cargo"] }
 shellexpand = "^3"
 tar = "0.4.39"
 serde = { version = "^1", features = ["derive"] }
-serde_yaml = "0.9.25"
+serde_yaml = "0.9.30"
 anyhow = "^1"
 sha2 = "0.10.7"
 data-encoding = "^2"