Bump cachetools from 6.2.5 to 6.2.6 (#760)

Bumps [cachetools](https://github.com/tkem/cachetools) from 6.2.5 to
6.2.6.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/tkem/cachetools/blob/master/CHANGELOG.rst">cachetools's
changelog</a>.</em></p>
<blockquote>
<h1>v6.2.6 (2026-01-27)</h1>
<ul>
<li>
<p>Improve typedkey performance.</p>
</li>
<li>
<p>Minor documentation improvements.</p>
</li>
<li>
<p>Minor testing improvements.</p>
</li>
<li>
<p>Minor code readability improvements.</p>
</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/tkem/cachetools/commit/318ed714b089293c22ceccb1fa5b32fd9663e4b3"><code>318ed71</code></a>
Release v6.2.6.</li>
<li><a
href="https://github.com/tkem/cachetools/commit/48443ffa81c5fef6aeebcba0b582a3fa11fd67bd"><code>48443ff</code></a>
Fix Cache.popitem test.</li>
<li><a
href="https://github.com/tkem/cachetools/commit/709819ca5480e9a34ba62cb2773a8eda34389deb"><code>709819c</code></a>
Fix test method naming.</li>
<li><a
href="https://github.com/tkem/cachetools/commit/68e4b9cafa0c81cbb545d5036196e4d1b971dc22"><code>68e4b9c</code></a>
Minor documentation improvements.</li>
<li><a
href="https://github.com/tkem/cachetools/commit/8ee4015e5c8e4c20b2b272045b0b1e3bc444feaa"><code>8ee4015</code></a>
Minor code readability improvements.</li>
<li><a
href="https://github.com/tkem/cachetools/commit/ea47f9967dc71d70260626c93cc8179c7c1f1acb"><code>ea47f99</code></a>
Improve typedkey performance.</li>
<li>See full diff in <a
href="https://github.com/tkem/cachetools/compare/v6.2.5...v6.2.6">compare
view</a></li>
</ul>
</details>
<br />


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