chore(deps): bump rand from 0.9.1 to 0.9.2 in /codex-rs (openai#1637)

Bumps [rand](https://github.com/rust-random/rand) from 0.9.1 to 0.9.2.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/rust-random/rand/blob/master/CHANGELOG.md">rand's
changelog</a>.</em></p>
<blockquote>
<h2>[0.9.2 — 2025-07-20]</h2>
<h3>Deprecated</h3>
<ul>
<li>Deprecate <code>rand::rngs::mock</code> module and
<code>StepRng</code> generator (<a
href="https://redirect.github.com/rust-random/rand/issues/1634">#1634</a>)</li>
</ul>
<h3>Additions</h3>
<ul>
<li>Enable <code>WeightedIndex&lt;usize&gt;</code> (de)serialization (<a
href="https://redirect.github.com/rust-random/rand/issues/1646">#1646</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/rust-random/rand/commit/d3dd4157052e5431ce42e157b544968560a68b95"><code>d3dd415</code></a>
Prepare rand_core 0.9.2 (<a
href="https://redirect.github.com/rust-random/rand/issues/1605">#1605</a>)</li>
<li><a
href="https://github.com/rust-random/rand/commit/99fabd20e9b39d0af7c2ed6c31dbcad83a1703fd"><code>99fabd2</code></a>
Prepare rand_core 0.9.2</li>
<li><a
href="https://github.com/rust-random/rand/commit/c7fe1c43b5ba53aacad5fbac94a8b88788564049"><code>c7fe1c4</code></a>
rand: re-export <code>rand_core</code> (<a
href="https://redirect.github.com/rust-random/rand/issues/1604">#1604</a>)</li>
<li><a
href="https://github.com/rust-random/rand/commit/db2b1e0bb41b0a1435b9fecaa1b7bdb531183204"><code>db2b1e0</code></a>
rand: re-export <code>rand_core</code></li>
<li><a
href="https://github.com/rust-random/rand/commit/ee1d96f9f527dbe6f873c8a5ccf47d60a6b8f7b7"><code>ee1d96f</code></a>
rand_core: implement reborrow for <code>UnwrapMut</code> (<a
href="https://redirect.github.com/rust-random/rand/issues/1595">#1595</a>)</li>
<li><a
href="https://github.com/rust-random/rand/commit/e0eb2ee0fcc0b07afb901465f4a8ba7f07128f87"><code>e0eb2ee</code></a>
rand_core: implement reborrow for <code>UnwrapMut</code></li>
<li><a
href="https://github.com/rust-random/rand/commit/975f602f5dbbdab0a024e0c5e8b527907426bd8c"><code>975f602</code></a>
fixup clippy 1.85 warnings</li>
<li><a
href="https://github.com/rust-random/rand/commit/775b05be1b8a4fdef17c6601cd223551fbf67edc"><code>775b05b</code></a>
Relax <code>Sized</code> requirements for blanket impls (<a
href="https://redirect.github.com/rust-random/rand/issues/1593">#1593</a>)</li>
<li>See full diff in <a
href="https://github.com/rust-random/rand/compare/rand_core-0.9.1...rand_core-0.9.2">compare
view</a></li>
</ul>
</details>
<br />


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