Bump gunicorn from 21.2.0 to 22.0.0 (#502)

Bumps [gunicorn](https://github.com/benoitc/gunicorn) from 21.2.0 to
22.0.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/benoitc/gunicorn/releases">gunicorn's
releases</a>.</em></p>
<blockquote>
<h2>Gunicorn 22.0 has been released</h2>
<p><strong>Gunicorn 22.0.0 has been released.</strong> This version fix
the numerous security vulnerabilities. You're invited to upgrade asap
your own installation.</p>
<p>Changes:</p>
<pre><code>22.0.0 - 2024-04-17
===================
<ul>
<li>use <code>utime</code> to notify workers liveness</li>
<li>migrate setup to pyproject.toml</li>
<li>fix numerous security vulnerabilities in HTTP parser (closing some
request smuggling vectors)</li>
<li>parsing additional requests is no longer attempted past unsupported
request framing</li>
<li>on HTTP versions &lt; 1.1 support for chunked transfer is refused
(only used in exploits)</li>
<li>requests conflicting configured or passed SCRIPT_NAME now produce a
verbose error</li>
<li>Trailer fields are no longer inspected for headers indicating secure
scheme</li>
<li>support Python 3.12</li>
</ul>
<p>** Breaking changes **</p>
<ul>
<li>minimum version is Python 3.7</li>
<li>the limitations on valid characters in the HTTP method have been
bounded to Internet Standards</li>
<li>requests specifying unsupported transfer coding (order) are refused
by default (rare)</li>
<li>HTTP methods are no longer casefolded by default (IANA method
registry contains none affected)</li>
<li>HTTP methods containing the number sign (#) are no longer accepted
by default (rare)</li>
<li>HTTP versions &lt; 1.0 or &gt;= 2.0 are no longer accepted by
default (rare, only HTTP/1.1 is supported)</li>
<li>HTTP versions consisting of multiple digits or containing a
prefix/suffix are no longer accepted</li>
<li>HTTP header field names Gunicorn cannot safely map to variables are
silently dropped, as in other software</li>
<li>HTTP headers with empty field name are refused by default (no
legitimate use cases, used in exploits)</li>
<li>requests with both Transfer-Encoding and Content-Length are refused
by default (such a message might indicate an attempt to perform request
smuggling)</li>
<li>empty transfer codings are no longer permitted (reportedly seen with
really old &amp; broken proxies)</li>
</ul>
<p>** SECURITY **</p>
<ul>
<li>fix CVE-2024-1135
</code></pre></li>
</ul>
<ol>
<li>Documentation is available there: <a
href="https://docs.gunicorn.org/en/stable/news.html">https://docs.gunicorn.org/en/stable/news.html</a></li>
<li>Packages: <a
href="https://pypi.org/project/gunicorn/">https://pypi.org/project/gunicorn/</a></li>
</ol>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/benoitc/gunicorn/commit/f63d59e4d73a8ee28748d2c700fb81c8780bc419"><code>f63d59e</code></a>
bump to 22.0</li>
<li><a
href="https://github.com/benoitc/gunicorn/commit/4ac81e0a1037ba5b570323be7430e09caa233e38"><code>4ac81e0</code></a>
Merge pull request <a
href="https://redirect.github.com/benoitc/gunicorn/issues/3175">#3175</a>
from e-kwsm/typo</li>
<li><a
href="https://github.com/benoitc/gunicorn/commit/401cecfaed85d79236c7a9a1f7d8946b01c466fc"><code>401cecf</code></a>
Merge pull request <a
href="https://redirect.github.com/benoitc/gunicorn/issues/3179">#3179</a>
from dhdaines/exclude-eventlet-0360</li>
<li><a
href="https://github.com/benoitc/gunicorn/commit/0243ec39ef4fc1b479ff4e1659e165f0b980b571"><code>0243ec3</code></a>
fix(deps): exclude eventlet 0.36.0</li>
<li><a
href="https://github.com/benoitc/gunicorn/commit/628a0bcb61ef3a211d67dfd68ad1ba161cccb3b8"><code>628a0bc</code></a>
chore: fix typos</li>
<li><a
href="https://github.com/benoitc/gunicorn/commit/88fc4a43152039c28096c8ba3eeadb3fbaa4aff9"><code>88fc4a4</code></a>
Merge pull request <a
href="https://redirect.github.com/benoitc/gunicorn/issues/3131">#3131</a>
from pajod/patch-py12-rebased</li>
<li><a
href="https://github.com/benoitc/gunicorn/commit/deae2fc4c5f93bfce59be5363055d4cd4ab1b0b6"><code>deae2fc</code></a>
CI: back off the agressive timeout</li>
<li><a
href="https://github.com/benoitc/gunicorn/commit/f4703824c323fe6867dce0e2f11013b8de319353"><code>f470382</code></a>
docs: promise 3.12 compat</li>
<li><a
href="https://github.com/benoitc/gunicorn/commit/5e30bfa6b1a3e1f2bde7feb514d1734d28f39231"><code>5e30bfa</code></a>
add changelog to project.urls (updated for PEP621)</li>
<li><a
href="https://github.com/benoitc/gunicorn/commit/481c3f9522edc58806a3efc5b49be4f202cc7700"><code>481c3f9</code></a>
remove setup.cfg - overridden by pyproject.toml</li>
<li>Additional commits viewable in <a
href="https://github.com/benoitc/gunicorn/compare/21.2.0...22.0.0">compare
view</a></li>
</ul>
</details>
<br />


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pyproject.toml

@@ -28,7 +28,7 @@ django-staff-sso-client = "^4.2.2"
 django-tables2 = "^2.4.0"
 djangorestframework = "^3.14.0"
 elastic-apm = "^6.2.2"
-gunicorn = "^21.2.0"
+gunicorn = "^22.0.0"
 psycopg2 = "^2.8.6"
 django-chunk-upload-handlers = "^0.0.14"
 sentry-sdk = "^1.25.1"