Bump cython from 3.0.11 to 3.0.12 (#10450)

Bumps [cython](https://github.com/cython/cython) from 3.0.11 to 3.0.12.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/cython/cython/blob/master/CHANGES.rst">cython's
changelog</a>.</em></p>
<blockquote>
<h1>3.0.12 (2025-02-11)</h1>
<h2>Bugs fixed</h2>
<ul>
<li>
<p>Release 3.0.11 introduced some incorrect <code>noexcept</code>
warnings.
(Github issue :issue:<code>6335</code>)</p>
</li>
<li>
<p>Conditional assignments to variables using the walrus operator could
crash.
(Github issue :issue:<code>6094</code>)</p>
</li>
<li>
<p>Dict assignments to struct members with reserved C names could
generate invalid C code.</p>
</li>
<li>
<p>Fused ctuples with the same entry types but different sizes could
fail to compile.
(Github issue :issue:<code>6328</code>)</p>
</li>
<li>
<p>In Py3, <code>pyximport</code> was not searching
<code>sys.path</code> when looking for importable source files.
(Github issue :issue:<code>5615</code>)</p>
</li>
<li>
<p>Using <code>&amp; 0</code> on integers produced with
<code>int.from_bytes()</code> could read invalid memory on Python 3.10.
(Github issue :issue:<code>6480</code>)</p>
</li>
<li>
<p>Modules could fail to compile in PyPy 3.11 due to missing CPython
specific header files.
Patch by Matti Picus.  (Github issue :issue:<code>6482</code>)</p>
</li>
<li>
<p>Minor fix in C++ <code>partial_sum()</code> declaration.</p>
</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/cython/cython/commit/c7dae70222b36f52945e9723acf72d2bd698b08d"><code>c7dae70</code></a>
Fix release date.</li>
<li><a
href="https://github.com/cython/cython/commit/b161c725492a91968a84f3bb7a43d8783706617f"><code>b161c72</code></a>
Prepare release of 3.0.12.</li>
<li><a
href="https://github.com/cython/cython/commit/45c98258971884c6f82aa9944076cc52d11f6a5b"><code>45c9825</code></a>
Update changelog.</li>
<li><a
href="https://github.com/cython/cython/commit/b9a5b7002b78d5be327ea62e1e128e8e393841c4"><code>b9a5b70</code></a>
Exclude failing CI target macos-13/Py2.7.</li>
<li><a
href="https://github.com/cython/cython/commit/07d7cc1ff148ad1ab552a1a2cbcf9ffa6011c5b8"><code>07d7cc1</code></a>
Fix spelling errors</li>
<li><a
href="https://github.com/cython/cython/commit/0824349cf41759d6c837855ecac4d23dfbc495c6"><code>0824349</code></a>
Fix test in Py2.7.</li>
<li><a
href="https://github.com/cython/cython/commit/20ebc99beeac5d8b00cc1c8ad77f69b9c617cdc4"><code>20ebc99</code></a>
Fix test in Py2.7.</li>
<li><a
href="https://github.com/cython/cython/commit/20f6e4f3408f6d190f180eb0a82e1d36265d9f6c"><code>20f6e4f</code></a>
Do not include CPython 'internal/*.h' files in PyPy (<a
href="https://redirect.github.com/cython/cython/issues/6482">GH-6482</a>)</li>
<li><a
href="https://github.com/cython/cython/commit/023738288cd210b64b52250e80078eaef028a035"><code>0237382</code></a>
Fix libcpp partial_sum definition</li>
<li><a
href="https://github.com/cython/cython/commit/852286242ee46cc16f0a6efef7eb40a5ab3c57d5"><code>8522862</code></a>
Backport ufunc Numpy2 fix</li>
<li>Additional commits viewable in <a
href="https://github.com/cython/cython/compare/3.0.11...3.0.12">compare
view</a></li>
</ul>
</details>
<br />


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requirements/constraints.txt

@@ -56,7 +56,7 @@ cryptography==44.0.0
     # via
     #   pyjwt
     #   trustme
-cython==3.0.11
+cython==3.0.12
     # via -r requirements/cython.in
 distlib==0.3.9
     # via virtualenv

requirements/cython.txt

@@ -4,7 +4,7 @@
 #
 #    pip-compile --allow-unsafe --output-file=requirements/cython.txt --resolver=backtracking --strip-extras requirements/cython.in
 #
-cython==3.0.11
+cython==3.0.12
     # via -r requirements/cython.in
 multidict==6.1.0
     # via -r requirements/multidict.in