chore(deps): bump lz4_flex from 0.13.0 to 0.13.1 in /czech-file-knife in the cargo group across 1 directory (#74)

Bumps the cargo group with 1 update in the /czech-file-knife directory:
[lz4_flex](https://github.com/pseitz/lz4_flex).

Updates `lz4_flex` from 0.13.0 to 0.13.1
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/PSeitz/lz4_flex/blob/main/CHANGELOG.md">lz4_flex's
changelog</a>.</em></p>
<blockquote>
<h1>0.13.1 (2026-05-09)</h1>
<h3>Fixes</h3>
<ul>
<li>Fix compression with short dictionaries (less than 4 bytes),
avoiding a panic/out-of-bounds read <a
href="https://redirect.github.com/PSeitz/lz4_flex/issues/222">#222</a></li>
</ul>
<pre><code>Compression with dictionaries shorter than the minimum match
length of 4 now falls
back to compression without a dictionary instead of panicking or reading
past
the dictionary. 
<p>This is a security fix for <code>unsafe</code> compression with
untrusted dictionaries.<br />
Users on 0.13.0 should upgrade to 0.13.1.<br />
</code></pre></p>
<ul>
<li>Fix panic in <code>From&lt;io::Error&gt;</code> implementation for
<code>frame::Error</code> <a
href="https://redirect.github.com/PSeitz/lz4_flex/issues/221">#221</a>
(thanks <a
href="https://github.com/phoerious"><code>@​phoerious</code></a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li>See full diff in <a
href="https://github.com/pseitz/lz4_flex/commits">compare view</a></li>
</ul>
</details>
<br />


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