Bump cython from 3.0.8 to 3.0.9 (#8207)

Bumps [cython](https://github.com/cython/cython) from 3.0.8 to 3.0.9.
<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>3.0.9 (2024-03-05)</h1>
<h2>Features added</h2>
<ul>
<li>
<p>Assigning <code>const</code> values to non-const variables now issues
a warning.
(Github issue :issue:<code>5639</code>)</p>
</li>
<li>
<p>Using <code>noexcept</code> on a function returning Python objects
now issues a warning.
(Github issue :issue:<code>5661</code>)</p>
</li>
<li>
<p>Some C-API usage was updated for the upcoming CPython 3.13.
Patches by Victor Stinner et al. (Github issues
:issue:<code>6003</code>, :issue:<code>6020</code>)</p>
</li>
<li>
<p>The deprecated <code>Py_UNICODE</code> type is no longer used, unless
required by user code.
(Github issue :issue:<code>5982</code>)</p>
</li>
<li>
<p><code>std::string.replace()</code> declarations were added to
libcpp.string.
Patch by Kieran Geary.  (Github issue :issue:<code>6037</code>)</p>
</li>
</ul>
<h2>Bugs fixed</h2>
<ul>
<li>
<p>Cython generates incorrect (but harmless) self-casts when directly
calling
final methods of subtypes. Lacking a better solution, the errors that
recent
gcc versions produce have been silenced for the time being.
Original patch by Michał Górny. (Github issue
:issue:<code>2747</code>)</p>
</li>
<li>
<p>Unused variable warnings about clineno were fixed when C lines in
tracebacks are disabled.
(Github issue :issue:<code>6035</code>)</p>
</li>
<li>
<p>Subclass deallocation of extern classes could crash if the base class
uses GC.
Original patch by Jason Fried. (Github issue
:issue:<code>5971</code>)</p>
</li>
<li>
<p>Type checks for Python <code>memoryview</code> could use an invalid C
function.
Patch by Xenia Lu.  (Github issue :issue:<code>5988</code>)</p>
</li>
<li>
<p>Calling final fused functions could generate invalid C code.
(Github issue :issue:<code>5989</code>)</p>
</li>
<li>
<p>Declaring extern enums multiple times could generate invalid C code.
(Github issue :issue:<code>5905</code>)</p>
</li>
<li>
<p><code>pyximport</code> used relative paths incorrectly.
Patch by Stefano Rivera.  (Github issue :issue:<code>5957</code>)</p>
</li>
<li>
<p>Running Cython with globbing characters (<code>[]*?</code>) in the
module search path could fail.
Patch by eewanco.  (Github issue :issue:<code>5942</code>)</p>
</li>
</ul>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/cython/cython/commit/31d4058ab2bd3c6a6fa25197ef4fc6ac62a2d95b"><code>31d4058</code></a>
Update release date.</li>
<li><a
href="https://github.com/cython/cython/commit/9d9189b394f13bb202b51bb9d3adcbb39a13540f"><code>9d9189b</code></a>
Build: Update cibuildwheel version.</li>
<li><a
href="https://github.com/cython/cython/commit/3cb9358d0a2dddbb2810f9a3ea50141c7202cfb1"><code>3cb9358</code></a>
Update changelog.</li>
<li><a
href="https://github.com/cython/cython/commit/5689c9f2aa5c9d0986cc263dca3b9cc81876e9b1"><code>5689c9f</code></a>
Disable gcc warnings/errors about wrong self casts in final function
calls (G...</li>
<li><a
href="https://github.com/cython/cython/commit/51d1ad0b7a7b3d6339fd0de1af44c8d0a99a4ede"><code>51d1ad0</code></a>
Add fixing of warning in 3.0.9 to CHANGES.rst (<a
href="https://redirect.github.com/cython/cython/issues/6041">#6041</a>)</li>
<li><a
href="https://github.com/cython/cython/commit/ec2a67d1475bb413092c0255721176d47ec29c80"><code>ec2a67d</code></a>
Update changelog.</li>
<li><a
href="https://github.com/cython/cython/commit/2da931d2e89887e7616379c35e81ba8335e570c5"><code>2da931d</code></a>
Disable GCC warnings/errors about wrong self casts in final function
calls.</li>
<li><a
href="https://github.com/cython/cython/commit/ba479419199e384ed72f538d3e77b0273e061bc6"><code>ba47941</code></a>
Prepare release of 3.0.9.</li>
<li><a
href="https://github.com/cython/cython/commit/bc683a46b6c2da14b410308d054d1e13b4e5b1e9"><code>bc683a4</code></a>
Add missing <code>replace</code> functions to C++
<code>std::string</code> declarations (<a
href="https://redirect.github.com/cython/cython/issues/6037">GH-6037</a>)</li>
<li><a
href="https://github.com/cython/cython/commit/a0a5e8dff5382512a520e68a49d770ad46bf9616"><code>a0a5e8d</code></a>
Update changelog.</li>
<li>Additional commits viewable in <a
href="https://github.com/cython/cython/compare/3.0.8...3.0.9">compare
view</a></li>
</ul>
</details>
<br />


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</details>

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requirements/constraints.txt

@@ -56,7 +56,7 @@ cryptography==41.0.3
     # via
     #   pyjwt
     #   trustme
-cython==3.0.8
+cython==3.0.9
     # via -r requirements/cython.in
 distlib==0.3.7
     # 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==3.0.8
+cython==3.0.9
     # via -r requirements/cython.in
 multidict==6.0.5
     # via -r requirements/multidict.in