Bump snow from 0.9.3 to 0.9.6 (#4061)

Bumps [snow](https://github.com/mcginty/snow) from 0.9.3 to 0.9.6.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/mcginty/snow/releases">snow's
releases</a>.</em></p>
<blockquote>
<h2>v0.9.6</h2>
<ul>
<li>Validate invalid PSK positions when building a Noise protocol.</li>
<li>Raise errors in various typos/mistakes in Noise patterns when
parsing.</li>
<li>Deprecate the <code>sodiumoxide</code> backend, as that crate is no
longer maintained. We may eventually migrate it to a maintaned version
of the crate, but for now it's best to warn users.</li>
<li>Set a hard limit in <code>read_message()</code> in transport mode to
65535 to be fully compliant with the Noise specification.</li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/mcginty/snow/compare/v0.9.5...v0.9.6">https://github.com/mcginty/snow/compare/v0.9.5...v0.9.6</a></p>
<h2>v0.9.5</h2>
<p>This is a security release that fixes a logic flaw in decryption in
<code>TransportState</code> (i.e. the stateful one), where the nonce
could increase even when decryption failed, which can cause a desync
between the sender and receiver, opening this up as a denial of service
vector if the attacker has the ability to inject packets in the channel
Noise is talking over.</p>
<p>More details can be found in the advisory: <a
href="https://github.com/mcginty/snow/security/advisories/GHSA-7g9j-g5jg-3vv3">https://github.com/mcginty/snow/security/advisories/GHSA-7g9j-g5jg-3vv3</a></p>
<p>All users are encouraged to update.</p>
<h2>v0.9.4</h2>
<p>This is a dependency version bump release because a couple of
important dependencies released new versions that needed a
<code>Cargo.toml</code> bump:</p>
<ul>
<li><code>ring</code> 0.17</li>
<li><code>pqcrypto-kyber</code> 0.8</li>
<li><code>aes-gcm</code> 0.10</li>
<li><code>chacha20poly1305</code> 0.10</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/mcginty/snow/commit/a4be73faa042c5967f39662aa66919f774831a9a"><code>a4be73f</code></a>
meta: v0.9.6 release</li>
<li><a
href="https://github.com/mcginty/snow/commit/9e53dcf5bbea869b5e3e9ed26866d683906bc848"><code>9e53dcf</code></a>
TransportState: limit read_message size to 65535</li>
<li><a
href="https://github.com/mcginty/snow/commit/faf05609e19f4106cd47b78123415dfeb9330861"><code>faf0560</code></a>
Deprecate sodiumoxide resolver</li>
<li><a
href="https://github.com/mcginty/snow/commit/308a24d23da13cb01a173f0ec23f140898801fb9"><code>308a24d</code></a>
Add warnings about multiple calls to same method in Builder</li>
<li><a
href="https://github.com/mcginty/snow/commit/f280991ae408685d72e098545314f2be160e57f9"><code>f280991</code></a>
Error when extraneous parameters are included in string to parse</li>
<li><a
href="https://github.com/mcginty/snow/commit/dbdcc4803aae6e5d9910163a7d52e0df8def4310"><code>dbdcc48</code></a>
Error on duplicate modifiers in parameter string</li>
<li><a
href="https://github.com/mcginty/snow/commit/8b1a819c93ceae98f9ba0a1be192fa61fdec78c2"><code>8b1a819</code></a>
Validate PSK index in pattern to avoid panic</li>
<li><a
href="https://github.com/mcginty/snow/commit/74e30cf591d6d89c8a1670ee713ecc4e9607e38f"><code>74e30cf</code></a>
meta: v0.9.5 release</li>
<li><a
href="https://github.com/mcginty/snow/commit/12e8ae55547ae297d5f70599e5c884ea891303eb"><code>12e8ae5</code></a>
Stateful nonce desync fix</li>
<li><a
href="https://github.com/mcginty/snow/commit/02c26b7551cb7e221792a9d3d3a94730e6a34e8a"><code>02c26b7</code></a>
Remove clap from simple example</li>
<li>Additional commits viewable in <a
href="https://github.com/mcginty/snow/compare/v0.9.3...v0.9.6">compare
view</a></li>
</ul>
</details>
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