Bump sha2 from 0.10.6 to 0.10.7 in /packer (#4843)

Summary:
Bumps [sha2](https://github.com/RustCrypto/hashes) from 0.10.6 to 0.10.7.
<details>
<summary>Commits</summary>
<ul>
<li><a href="d8b088aece"><code>d8b088a</code></a> Release sha2 v0.10.7 (<a href="https://redirect.github.com/RustCrypto/hashes/issues/491">https://github.com/facebook/flipper/issues/491</a>)</li>
<li><a href="3fa561ed2e"><code>3fa561e</code></a> sha2: Add aarch64 backends (<a href="https://redirect.github.com/RustCrypto/hashes/issues/490">https://github.com/facebook/flipper/issues/490</a>)</li>
<li><a href="a16cb4c753"><code>a16cb4c</code></a> jh: fix license</li>
<li><a href="1affb24f1a"><code>1affb24</code></a> JH hash implementation (<a href="https://redirect.github.com/RustCrypto/hashes/issues/484">https://github.com/facebook/flipper/issues/484</a>)</li>
<li><a href="cf5f1d2dfe"><code>cf5f1d2</code></a> k12: fix typo in README.md (<a href="https://redirect.github.com/RustCrypto/hashes/issues/489">https://github.com/facebook/flipper/issues/489</a>)</li>
<li><a href="df9b8a2cce"><code>df9b8a2</code></a> k12 v0.3.0 (<a href="https://redirect.github.com/RustCrypto/hashes/issues/488">https://github.com/facebook/flipper/issues/488</a>)</li>
<li><a href="c24e4b8264"><code>c24e4b8</code></a> k12: 2021 edition upgrade; MSRV 1.56 (<a href="https://redirect.github.com/RustCrypto/hashes/issues/487">https://github.com/facebook/flipper/issues/487</a>)</li>
<li><a href="ca07d232e8"><code>ca07d23</code></a> Use cargo-hack in CI jobs (<a href="https://redirect.github.com/RustCrypto/hashes/issues/485">https://github.com/facebook/flipper/issues/485</a>)</li>
<li><a href="d174ad743c"><code>d174ad7</code></a> Skein hash implementation (<a href="https://redirect.github.com/RustCrypto/hashes/issues/483">https://github.com/facebook/flipper/issues/483</a>)</li>
<li><a href="9df20e865c"><code>9df20e8</code></a> build(deps): bump digest from 0.10.6 to 0.10.7 (<a href="https://redirect.github.com/RustCrypto/hashes/issues/481">https://github.com/facebook/flipper/issues/481</a>)</li>
<li>Additional commits viewable in <a href="https://github.com/RustCrypto/hashes/compare/sha2-v0.10.6...sha2-v0.10.7">compare view</a></li>
</ul>
</details>
<br />

[![Dependabot compatibility score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=sha2&package-manager=cargo&previous-version=0.10.6&new-version=0.10.7)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

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Pull Request resolved: https://github.com/facebook/flipper/pull/4843

Reviewed By: lblasa

Differential Revision: D47916706

Pulled By: passy

fbshipit-source-id: 40742c77fedb4d83bda6ca698b10b04d75681864

packer/Cargo.toml

@@ -16,7 +16,7 @@ tar = "0.4.39"
 serde = { version = "^1", features = ["derive"] }
 serde_yaml = "0.9.25"
 anyhow = "^1"
-sha2 = "0.10.6"
+sha2 = "0.10.7"
 data-encoding = "^2"
 serde_json = "^1"
 rayon = "^1.7"