Bump anyhow from 1.0.50 to 1.0.51 in /packer (#3129)

Summary:
Bumps [anyhow](https://github.com/dtolnay/anyhow) from 1.0.50 to 1.0.51.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/dtolnay/anyhow/releases">anyhow's releases</a>.</em></p>
<blockquote>
<h2>1.0.51</h2>
<ul>
<li>Show doc for <code>Ok</code> fn</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="871be23b2c"><code>871be23</code></a> Release 1.0.51</li>
<li><a href="97cff686ef"><code>97cff68</code></a> Show doc for Ok fn</li>
<li>See full diff in <a href="https://github.com/dtolnay/anyhow/compare/1.0.50...1.0.51">compare view</a></li>
</ul>
</details>
<br />

[![Dependabot compatibility score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=anyhow&package-manager=cargo&previous-version=1.0.50&new-version=1.0.51)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

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</details>

Pull Request resolved: https://github.com/facebook/flipper/pull/3129

Reviewed By: nikoant

Differential Revision: D33025282

Pulled By: passy

fbshipit-source-id: 4cc24a74933155c8d24e6030cab160b39623fbfc

packer/Cargo.toml

@@ -15,7 +15,7 @@ shellexpand = "2.1.0"
 tar = "0.4.37"
 serde = { version = "1.0.130", features = ["derive"] }
 serde_yaml = "0.8.21"
-anyhow = "1.0.50"
+anyhow = "1.0.51"
 sha2 = "0.9.6"
 data-encoding = "2.3.2"
 serde_json = "1.0.67"