chore(deps): bump regex from 1.13.0 to 1.13.1 in /czech-file-knife (#245)

Bumps [regex](https://github.com/rust-lang/regex) from 1.13.0 to 1.13.1.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/rust-lang/regex/blob/master/CHANGELOG.md">regex's
changelog</a>.</em></p>
<blockquote>
<h1>1.13.1 (2026-07-15)</h1>
<p>This is a release that fixes a bug where incorrect regex match
offsets could be
reported. Note that this doesn't impact whether a match occurs or not,
just
where it occurs. The match offsets are still valid for slicing, they
just may
not refer to the correct leftmost-first match. See
<a
href="https://redirect.github.com/rust-lang/regex/pull/1364">#1364</a>
for (many) more details.</p>
<p>Bug fixes:</p>
<ul>
<li><a
href="https://redirect.github.com/rust-lang/regex/issues/1354">#1354</a>:
Fixes previously unsound reverse suffix and inner optimizations.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/rust-lang/regex/commit/2b527599eb9eea0dcc288c704584f242f26a5c61"><code>2b52759</code></a>
1.13.1, redux</li>
<li><a
href="https://github.com/rust-lang/regex/commit/40e98238fff903f3e1ec95bbdb487185dd60504a"><code>40e9823</code></a>
1.13.1</li>
<li><a
href="https://github.com/rust-lang/regex/commit/75fcb962d6ea1c456f6f023c9537a66389413a85"><code>75fcb96</code></a>
changelog: 1.13.1</li>
<li><a
href="https://github.com/rust-lang/regex/commit/64ad0b618e043b791ed5385dd5504a436da1ddae"><code>64ad0b6</code></a>
automata: fix bug in reverse suffix/inner optimization</li>
<li><a
href="https://github.com/rust-lang/regex/commit/fa91c31a4291c9dda6afe19829e6fe2e3bbc2da5"><code>fa91c31</code></a>
automata: fix a bug caught by Codex review</li>
<li><a
href="https://github.com/rust-lang/regex/commit/30390ec3e8889aad830337cdf3a7a01ae195ae73"><code>30390ec</code></a>
automata: formatting tweaks</li>
<li><a
href="https://github.com/rust-lang/regex/commit/821a8eb1ad7860ddc788fe36f495036df63cfc35"><code>821a8eb</code></a>
automata: refactor reverse suffix/inner search slightly</li>
<li><a
href="https://github.com/rust-lang/regex/commit/10afd704d88d00ddfcd10218883a81b3ae5e4831"><code>10afd70</code></a>
automata: expose the extracted literals for inner literal
extraction</li>
<li><a
href="https://github.com/rust-lang/regex/commit/8c34f41d3c5a0e16ce17dfb964587cb48625a8d5"><code>8c34f41</code></a>
automata: avoid reverse suffix optimization for non-leftmost-first</li>
<li><a
href="https://github.com/rust-lang/regex/commit/5524f02430d2d118d5c34fde54136d08376de711"><code>5524f02</code></a>
test: add regression tests for failed reverse suffix/inner
optimizations</li>
<li>Additional commits viewable in <a
href="https://github.com/rust-lang/regex/compare/1.13.0...1.13.1">compare
view</a></li>
</ul>
</details>
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