Bump anyhow from 1.0.70 to 1.0.71 in /packer (#4707)

Summary:
Bumps [anyhow](https://github.com/dtolnay/anyhow) from 1.0.70 to 1.0.71.
<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>1.0.71</h2>
<ul>
<li>Documentation improvements</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="8b4fc43429"><code>8b4fc43</code></a> Release 1.0.71</li>
<li><a href="3c33b4b072"><code>3c33b4b</code></a> Merge pull request <a href="https://redirect.github.com/dtolnay/anyhow/issues/306">#306</a> from dtolnay/noinline</li>
<li><a href="d491b88840"><code>d491b88</code></a> Mark format_err macro as doc(no_inline)</li>
<li>See full diff in <a href="https://github.com/dtolnay/anyhow/compare/1.0.70...1.0.71">compare view</a></li>
</ul>
</details>
<br />

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</details>

Pull Request resolved: https://github.com/facebook/flipper/pull/4707

Reviewed By: antonk52

Differential Revision: D45484397

Pulled By: passy

fbshipit-source-id: 4c960ef862e882789a6a1ff94aafb5b62ffb5058

packer/Cargo.lock

@@ -13,9 +13,9 @@ dependencies = [
 
 [[package]]
 name = "anyhow"
-version = "1.0.70"
+version = "1.0.71"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7de8ce5e0f9f8d88245311066a578d72b7af3e7088f32783804676302df237e4"
+checksum = "9c7d0618f0e0b7e8ff11427422b64564d5fb0be1940354bfe2e0529b18a9d9b8"
 
 [[package]]
 name = "atty"