Bump orjson from 3.9.3 to 3.9.4 (#833)

Bumps [orjson](https://github.com/ijl/orjson) from 3.9.3 to 3.9.4.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/ijl/orjson/releases">orjson's
releases</a>.</em></p>
<blockquote>
<h2>3.9.4</h2>
<h3>Fixed</h3>
<ul>
<li>Fix hash builder using default values.</li>
<li>Fix non-release builds of orjson copying large deserialization
buffer
from stack to heap. This was introduced in 3.9.3.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/ijl/orjson/blob/master/CHANGELOG.md">orjson's
changelog</a>.</em></p>
<blockquote>
<h2>3.9.4 - 2023-08-07</h2>
<h3>Fixed</h3>
<ul>
<li>Fix hash builder using default values.</li>
<li>Fix non-release builds of orjson copying large deserialization
buffer
from stack to heap. This was introduced in 3.9.3.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/ijl/orjson/commit/281a9d8451c5a54a6fe34a586324363f131a3697"><code>281a9d8</code></a>
3.9.4</li>
<li><a
href="https://github.com/ijl/orjson/commit/76505d4cd20ab59f3a9cf7f9120bd444b94a1d0b"><code>76505d4</code></a>
Fix HASH_BUILDER using default values</li>
<li><a
href="https://github.com/ijl/orjson/commit/caae033ee1c1a0bb704643153f271a29d48fc28e"><code>caae033</code></a>
Fix stack overflow from copying large yyjson buffer</li>
<li>See full diff in <a
href="https://github.com/ijl/orjson/compare/3.9.3...3.9.4">compare
view</a></li>
</ul>
</details>
<br />

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