chore: bump orjson from 3.11.5 to 3.11.6 in /libs/partners/openai (#35860)

Bumps [orjson](https://github.com/ijl/orjson) from 3.11.5 to 3.11.6.
<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>3.11.6</h2>
<h3>Changed</h3>
<ul>
<li>orjson now includes code licensed under the Mozilla Public License
2.0 (MPL-2.0).</li>
<li>Drop support for Python 3.9.</li>
<li>ABI compatibility with CPython 3.15 alpha 5.</li>
<li>Build now depends on Rust 1.89 or later instead of 1.85.</li>
</ul>
<h3>Fixed</h3>
<ul>
<li>Fix sporadic crash serializing deeply nested <code>list</code> of
<code>dict</code>.</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>3.11.6 - 2026-01-29</h2>
<h3>Changed</h3>
<ul>
<li>orjson now includes code licensed under the Mozilla Public License
2.0 (MPL-2.0).</li>
<li>Drop support for Python 3.9.</li>
<li>ABI compatibility with CPython 3.15 alpha 5.</li>
<li>Build now depends on Rust 1.89 or later instead of 1.85.</li>
</ul>
<h3>Fixed</h3>
<ul>
<li>Fix sporadic crash serializing deeply nested <code>list</code> of
<code>dict</code>.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/ijl/orjson/commit/ec02024c3837255064f248c0d2d331319b75e9ad"><code>ec02024</code></a>
3.11.6</li>
<li><a
href="https://github.com/ijl/orjson/commit/d58168733189f82b3fd0c058dff73e05d09202e6"><code>d581687</code></a>
build, clippy misc</li>
<li><a
href="https://github.com/ijl/orjson/commit/4105b29b2275f200f6fae01349bef02ccf1bc2e2"><code>4105b29</code></a>
writer::num</li>
<li><a
href="https://github.com/ijl/orjson/commit/62bb185b70785ded49c79c26f8c9781f1e6fe370"><code>62bb185</code></a>
Fix sporadic crash on serializing object close</li>
<li><a
href="https://github.com/ijl/orjson/commit/d860078a973f44401265c5c4ad12a7dbe4f839ad"><code>d860078</code></a>
PyRef idiom refactors</li>
<li><a
href="https://github.com/ijl/orjson/commit/343ae2f148197918aba9f8562db42c364620e4b8"><code>343ae2f</code></a>
Deserializer, Utf8Buffer</li>
<li><a
href="https://github.com/ijl/orjson/commit/7835f58d1c56947d1cf7a18acdfc07a2bca9b0f2"><code>7835f58</code></a>
PyBytesRef and other input refactor</li>
<li><a
href="https://github.com/ijl/orjson/commit/71e0516424ce1e11613eb1780f18e8cde83989fd"><code>71e0516</code></a>
PyStrRef</li>
<li><a
href="https://github.com/ijl/orjson/commit/1096df42dc585fde837ed0c930a346f5ef7dbb94"><code>1096df4</code></a>
MSRV 1.89</li>
<li><a
href="https://github.com/ijl/orjson/commit/b718e75b8ba18a707c2b44b6de14d52547573771"><code>b718e75</code></a>
Drop support for python3.9</li>
<li>Additional commits viewable in <a
href="https://github.com/ijl/orjson/compare/3.11.5...3.11.6">compare
view</a></li>
</ul>
</details>
<br />


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