Bump aiohttp from 3.9.3 to 3.9.4 in /backend in the pip group across 1 directory (#7)

Bumps the pip group with 1 update in the /backend directory:
[aiohttp](https://github.com/aio-libs/aiohttp).

Updates `aiohttp` from 3.9.3 to 3.9.4
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/aio-libs/aiohttp/releases">aiohttp's
releases</a>.</em></p>
<blockquote>
<h2>3.9.4</h2>
<h2>Bug fixes</h2>
<ul>
<li>
<p>The asynchronous internals now set the underlying causes
when assigning exceptions to the future objects
-- by :user:<code>webknjaz</code>.</p>
<p><em>Related issues and pull requests on GitHub:</em>
<a
href="https://redirect.github.com/aio-libs/aiohttp/issues/8089">#8089</a>.</p>
</li>
<li>
<p>Treated values of <code>Accept-Encoding</code> header as
case-insensitive when checking
for gzip files -- by :user:<code>steverep</code>.</p>
<p><em>Related issues and pull requests on GitHub:</em>
<a
href="https://redirect.github.com/aio-libs/aiohttp/issues/8104">#8104</a>.</p>
</li>
<li>
<p>Improved the DNS resolution performance on cache hit -- by
:user:<code>bdraco</code>.</p>
<p>This is achieved by avoiding an :mod:<code>asyncio</code> task
creation in this case.</p>
<p><em>Related issues and pull requests on GitHub:</em>
<a
href="https://redirect.github.com/aio-libs/aiohttp/issues/8163">#8163</a>.</p>
</li>
<li>
<p>Changed the type annotations to allow <code>dict</code> on
:meth:<code>aiohttp.MultipartWriter.append</code>,
:meth:<code>aiohttp.MultipartWriter.append_json</code> and
:meth:<code>aiohttp.MultipartWriter.append_form</code> -- by
:user:<code>cakemanny</code></p>
<p><em>Related issues and pull requests on GitHub:</em>
<a
href="https://redirect.github.com/aio-libs/aiohttp/issues/7741">#7741</a>.</p>
</li>
<li>
<p>Ensure websocket transport is closed when client does not close it
-- by :user:<code>bdraco</code>.</p>
<p>The transport could remain open if the client did not close it. This
change ensures the transport is closed when the client does not close
it.</p>
</li>
</ul>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/aio-libs/aiohttp/blob/master/CHANGES.rst">aiohttp's
changelog</a>.</em></p>
<blockquote>
<h1>3.9.4 (2024-04-11)</h1>
<h2>Bug fixes</h2>
<ul>
<li>
<p>The asynchronous internals now set the underlying causes
when assigning exceptions to the future objects
-- by :user:<code>webknjaz</code>.</p>
<p><em>Related issues and pull requests on GitHub:</em>
:issue:<code>8089</code>.</p>
</li>
<li>
<p>Treated values of <code>Accept-Encoding</code> header as
case-insensitive when checking
for gzip files -- by :user:<code>steverep</code>.</p>
<p><em>Related issues and pull requests on GitHub:</em>
:issue:<code>8104</code>.</p>
</li>
<li>
<p>Improved the DNS resolution performance on cache hit -- by
:user:<code>bdraco</code>.</p>
<p>This is achieved by avoiding an :mod:<code>asyncio</code> task
creation in this case.</p>
<p><em>Related issues and pull requests on GitHub:</em>
:issue:<code>8163</code>.</p>
</li>
<li>
<p>Changed the type annotations to allow <code>dict</code> on
:meth:<code>aiohttp.MultipartWriter.append</code>,
:meth:<code>aiohttp.MultipartWriter.append_json</code> and
:meth:<code>aiohttp.MultipartWriter.append_form</code> -- by
:user:<code>cakemanny</code></p>
<p><em>Related issues and pull requests on GitHub:</em>
:issue:<code>7741</code>.</p>
</li>
<li>
<p>Ensure websocket transport is closed when client does not close it
-- by :user:<code>bdraco</code>.</p>
<p>The transport could remain open if the client did not close it. This
change ensures the transport is closed when the client does not close
it.</p>
</li>
</ul>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/aio-libs/aiohttp/commit/b3397c7ac44fc80206d28f1dd0d1f3b10c4ec572"><code>b3397c7</code></a>
Release v3.9.4 (<a
href="https://redirect.github.com/aio-libs/aiohttp/issues/8201">#8201</a>)</li>
<li><a
href="https://github.com/aio-libs/aiohttp/commit/a7e240a9f625a0b9559bdf5f0049c71565352400"><code>a7e240a</code></a>
[PR <a
href="https://redirect.github.com/aio-libs/aiohttp/issues/8320">#8320</a>/9ba9a4e5
backport][3.9] Fix Python parser to mark responses without...</li>
<li><a
href="https://github.com/aio-libs/aiohttp/commit/28335525d1eac015a7e7584137678cbb6ff19397"><code>2833552</code></a>
Escape filenames and paths in HTML when generating index pages (<a
href="https://redirect.github.com/aio-libs/aiohttp/issues/8317">#8317</a>)
(<a
href="https://redirect.github.com/aio-libs/aiohttp/issues/8319">#8319</a>)</li>
<li><a
href="https://github.com/aio-libs/aiohttp/commit/ed43040613988fc4666109aca82a5180ff165df5"><code>ed43040</code></a>
[PR <a
href="https://redirect.github.com/aio-libs/aiohttp/issues/8309">#8309</a>/c29945a1
backport][3.9] Improve reliability of run_app test (<a
href="https://redirect.github.com/aio-libs/aiohttp/issues/8315">#8315</a>)</li>
<li><a
href="https://github.com/aio-libs/aiohttp/commit/ec2be0500e2674eea019c0966a7a905e9b3d6608"><code>ec2be05</code></a>
[PR <a
href="https://redirect.github.com/aio-libs/aiohttp/issues/8299">#8299</a>/28d026eb
backport][3.9] Create marker for internal tests (<a
href="https://redirect.github.com/aio-libs/aiohttp/issues/8307">#8307</a>)</li>
<li><a
href="https://github.com/aio-libs/aiohttp/commit/292d961f4ee2829a1b13fad92444a4fd693fbc87"><code>292d961</code></a>
[PR <a
href="https://redirect.github.com/aio-libs/aiohttp/issues/8304">#8304</a>/88c80c14
backport][3.9] Check for backports in CI (<a
href="https://redirect.github.com/aio-libs/aiohttp/issues/8305">#8305</a>)</li>
<li><a
href="https://github.com/aio-libs/aiohttp/commit/cebe526b9c34dc3a3da9140409db63014bc4cf19"><code>cebe526</code></a>
Fix handling of multipart/form-data (<a
href="https://redirect.github.com/aio-libs/aiohttp/issues/8280">#8280</a>)
(<a
href="https://redirect.github.com/aio-libs/aiohttp/issues/8302">#8302</a>)</li>
<li><a
href="https://github.com/aio-libs/aiohttp/commit/270ae9cf6a9e6159b5e29a950deb6ff7600aebc5"><code>270ae9c</code></a>
[PR <a
href="https://redirect.github.com/aio-libs/aiohttp/issues/8297">#8297</a>/d15f07cf
backport][3.9] Upgrade to llhttp 9.2.1 (<a
href="https://redirect.github.com/aio-libs/aiohttp/issues/8292">#8292</a>)
(<a
href="https://redirect.github.com/aio-libs/aiohttp/issues/8298">#8298</a>)</li>
<li><a
href="https://github.com/aio-libs/aiohttp/commit/bb231059b14277c34a8a0331e51406d5abe4f424"><code>bb23105</code></a>
[PR <a
href="https://redirect.github.com/aio-libs/aiohttp/issues/8283">#8283</a>/54e13b0a
backport][3.9] Fix blocking I/O in the event loop while pr...</li>
<li><a
href="https://github.com/aio-libs/aiohttp/commit/3f79241bcbc02c9850348fc04c064fcbc980e8f0"><code>3f79241</code></a>
[PR <a
href="https://redirect.github.com/aio-libs/aiohttp/issues/8286">#8286</a>/28f1fd88
backport][3.9] docs: remove repetitive word in comment (<a
href="https://redirect.github.com/aio-libs/aiohttp/issues/8">#8</a>...</li>
<li>Additional commits viewable in <a
href="https://github.com/aio-libs/aiohttp/compare/v3.9.3...v3.9.4">compare
view</a></li>
</ul>
</details>
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backend/requirements.txt

@@ -1,4 +1,4 @@
-aiohttp==3.9.3
+aiohttp==3.9.4
 aiosignal==1.3.1
 attrs==23.2.0
 blinker==1.7.0