Build: Bump fastavro from 1.12.0 to 1.12.1 (#2623)

Bumps [fastavro](https://github.com/fastavro/fastavro) from 1.12.0 to
1.12.1.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/fastavro/fastavro/blob/master/ChangeLog">fastavro's
changelog</a>.</em></p>
<blockquote>
<p>2025-10-10 version 1.12.1</p>
<ul>
<li>Publish Python 3.14 Wheels (<a
href="https://github.com/billy-doyle"><code>@​billy-doyle</code></a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/fastavro/fastavro/commit/1023e34d85cfe5ae4360152ef0a3973524822c58"><code>1023e34</code></a>
1.12.1</li>
<li><a
href="https://github.com/fastavro/fastavro/commit/ce2dc9e057e1286ae8ad59ad246035b301a5a969"><code>ce2dc9e</code></a>
feat: build 3.14 wheels</li>
<li><a
href="https://github.com/fastavro/fastavro/commit/d767953377ca49e5776f30b6a9467278d25047ff"><code>d767953</code></a>
Bump pypa/cibuildwheel from 3.1.4 to 3.2.0</li>
<li><a
href="https://github.com/fastavro/fastavro/commit/0da25e534965c12ffe96abd4d089a18263571715"><code>0da25e5</code></a>
fix warnings</li>
<li><a
href="https://github.com/fastavro/fastavro/commit/61612bd3e9ad78d23622cbd95dac30127d63abf6"><code>61612bd</code></a>
update wheel names</li>
<li><a
href="https://github.com/fastavro/fastavro/commit/061afb7c6d90485656cf33a5e550c54bd448df0c"><code>061afb7</code></a>
Bump actions/setup-python from 5 to 6</li>
<li><a
href="https://github.com/fastavro/fastavro/commit/cbf895cb3360f851b3c8cd98484a7633073e2130"><code>cbf895c</code></a>
Bump codecov/codecov-action from 5.5.0 to 5.5.1</li>
<li><a
href="https://github.com/fastavro/fastavro/commit/935b564f022b9778b23a181eddee2e0d59fc1200"><code>935b564</code></a>
Bump pypa/cibuildwheel from 3.1.3 to 3.1.4</li>
<li><a
href="https://github.com/fastavro/fastavro/commit/46c86617a266c9479b975edb6da395968bedacbf"><code>46c8661</code></a>
Bump codecov/codecov-action from 5.4.3 to 5.5.0</li>
<li><a
href="https://github.com/fastavro/fastavro/commit/87dc5759d82f7484d500ef9fb5c0b1e3d54b2d09"><code>87dc575</code></a>
Bump actions/checkout from 4 to 5</li>
<li>Additional commits viewable in <a
href="https://github.com/fastavro/fastavro/compare/1.12.0...1.12.1">compare
view</a></li>
</ul>
</details>
<br />


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