chore(deps-rs): bump bytemuck from 1.20.0 to 1.21.0 in the minor group (#736)

Bumps the minor group with 1 update:
[bytemuck](https://github.com/Lokathor/bytemuck).

Updates `bytemuck` from 1.20.0 to 1.21.0
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/Lokathor/bytemuck/blob/main/changelog.md">bytemuck's
changelog</a>.</em></p>
<blockquote>
<h1><code>bytemuck</code> changelog</h1>
<h2>1.21</h2>
<ul>
<li>Implement <code>Pod</code> and <code>Zeroable</code> for
<code>core::arch::{x86, x86_64}::__m512</code>, <code>__m512d</code> and
<code>__m512i</code> without nightly.
Requires Rust 1.72, and is gated through the <code>avx512_simd</code>
cargo feature.</li>
<li>Allow the use of <code>must_cast_mut</code> and
<code>must_cast_slice_mut</code> in const contexts.
Requires Rust 1.83, and is gated through the
<code>must_cast_extra</code> cargo feature.</li>
<li>internal: introduced the <code>maybe_const_fn</code> macro that
allows defining some function
to be const depending upon some <code>cfg</code> predicate.</li>
</ul>
<h2>1.20</h2>
<ul>
<li>New functions to allocate zeroed <code>Arc</code> and
<code>Rc</code>. Requires Rust 1.82</li>
<li><code>TransparentWrapper</code> impls for
<code>core::cmp::Reverse</code> and
<code>core::num::Saturating</code>.</li>
<li>internal: Simplified the library's <code>fill_zeroes</code> calls to
<code>write_bytes</code></li>
</ul>
<h2>1.19</h2>
<ul>
<li>Adds the <code>#[track_caller]</code> attribute to functions which
may panic.</li>
</ul>
<h2>1.18</h2>
<ul>
<li>Adds the <code>latest_stable_rust</code> cargo feature, which is a
blanket feature that turns all other features on that are both sound and
compatible with Stable rust.</li>
</ul>
<h2>1.17.1</h2>
<ul>
<li>Adds <code>#[repr(C)]</code> to the <code>union Transmute&lt;A,
B&gt;</code> type that's used internally
for most of the transmutations.</li>
</ul>
<h2>1.17.0</h2>
<ul>
<li>Makes the <code>must_cast</code> versions of the by-value and by-ref
casts be <code>const</code>.
The mut ref cast is unaffected for now (mut references aren't yet stable
in <code>const fn</code>).
This increases the MSRV of using that particular feature from 1.57 to
1.64.</li>
</ul>
<h2>1.16.3</h2>
<ul>
<li>Fully described in <a
href="https://redirect.github.com/Lokathor/bytemuck/pull/256">Lokathor/bytemuck#256</a>,
This makes
casting slices to/from ZST elements more consistent between the crate's
core
module and other modules.</li>
</ul>
<h2>1.16.2</h2>
<ul>
<li>Fixes potential UB where <code>BoxBytes</code> could attempt to free
a dangling pointer
if the <code>Layout</code> is zero sized. This type was introduced in
1.14.1, so that
version and the others up to and including 1.16.1 are now yanked for
safety.</li>
</ul>
<h2>1.16.1</h2>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/Lokathor/bytemuck/commit/621848fcf09ac42000e3b9c548f17f252c7e399c"><code>621848f</code></a>
chore: Release bytemuck version 1.21.0</li>
<li><a
href="https://github.com/Lokathor/bytemuck/commit/75b54ef67db8eff0870ab980c9b756478aba0684"><code>75b54ef</code></a>
changelog</li>
<li><a
href="https://github.com/Lokathor/bytemuck/commit/45fbae7d8ddb8d75353588920c6fab16943e96bd"><code>45fbae7</code></a>
chore: Release bytemuck_derive version 1.8.1</li>
<li><a
href="https://github.com/Lokathor/bytemuck/commit/9d06a9358f0cb106fc36fbc1bc5ed93673c6cf05"><code>9d06a93</code></a>
changelog</li>
<li><a
href="https://github.com/Lokathor/bytemuck/commit/d6c589f9aa91d1f23053aa606c30104c57541c49"><code>d6c589f</code></a>
Cargo.toml: add transparentwrapper_extra to latest_stable_rust, and
expand on...</li>
<li><a
href="https://github.com/Lokathor/bytemuck/commit/9801bb977401136abece5c255669f7205a61b6ea"><code>9801bb9</code></a>
Update lib.rs (<a
href="https://redirect.github.com/Lokathor/bytemuck/issues/290">#290</a>)</li>
<li><a
href="https://github.com/Lokathor/bytemuck/commit/4bdaf0a8e8b35fc792a77b02237e0494b9c4ae50"><code>4bdaf0a</code></a>
Implements <code>Pod</code> and <code>Zeroable</code> for AVX512 types
that don't require nightly. ...</li>
<li><a
href="https://github.com/Lokathor/bytemuck/commit/227d7fe6e195587c15afd8bf334d0e5957f247ac"><code>227d7fe</code></a>
hide <code>unexpected_cfgs</code> warnings in proc-macro generated code
(<a
href="https://redirect.github.com/Lokathor/bytemuck/issues/287">#287</a>)</li>
<li>See full diff in <a
href="https://github.com/Lokathor/bytemuck/compare/v1.20.0...v1.21.0">compare
view</a></li>
</ul>
</details>
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Cargo.lock

@@ -44,7 +44,7 @@ itertools = "0.13.0"
 tket-json-rs = "0.7.1"
 tracing = "0.1.37"
 portmatching = "0.3.1"
-bytemuck = "1.20.0"
+bytemuck = "1.21.0"
 cgmath = "0.18.0"
 chrono = "0.4.39"
 clap = "4.5.23"