Bump furo from 2024.7.18 to 2024.8.6 (#422)

Bumps [furo](https://github.com/pradyunsg/furo) from 2024.7.18 to
2024.8.6.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/pradyunsg/furo/blob/main/docs/changelog.md">furo's
changelog</a>.</em></p>
<blockquote>
<h1>Changelog</h1>
<!-- raw HTML omitted -->
<h2>2024.08.06 -- Energetic Eminence</h2>
<ul>
<li>✨ Add support for Sphinx 8</li>
<li>✨ Add smoother transitions between breakpoints</li>
<li>Increase specificity of table-wrapper selector</li>
<li>Avoid page breaks inside paragraphs</li>
</ul>
<h2>2024.07.18 -- Dull Denim</h2>
<ul>
<li>Improve how icons are handled and aligned.</li>
<li>Improve scroll event handler.</li>
<li>Hide the copybutton by default.</li>
<li>Fix <code>source_view_link</code> configuration handling.</li>
<li>Fix close tag on pencil icon.</li>
</ul>
<h2>2024.05.06 -- Cheerful Cerulean</h2>
<ul>
<li>✨ Add new custom icons for auto mode, reflecting the currently
active theme.</li>
<li>✨ Add a view this page button.</li>
<li>✨ Add colours and highlighting to &quot;version modified&quot; API
helpers.</li>
<li>✨ Add release information to various customisation knobs.</li>
<li>Make all icons bigger and use a thinner stroke with them.</li>
</ul>
<h2>2024.04.27 -- Bold Burgundy</h2>
<ul>
<li>Add a skip to content link.</li>
<li>Add <code>--font-stack--headings</code>.</li>
<li>Add <code>:visited</code> colour and enforce uniform contrast
between light/dark.</li>
<li>Add an offset of <code>:target</code> to reduce back-to-top
overlap.</li>
<li>Improve dark mode colours.</li>
<li>Fix outstanding colour contrast warnings on Firefox.</li>
<li>Fix bad indent in footnotes.</li>
<li>Tweak handling of default configuration options in a more resilient
manner.</li>
<li>Tweak length and sizing of API <code>source</code> links.</li>
<li>Stop search engine indexing on search page.</li>
</ul>
<h2>2024.01.29 -- Amazing Amethyst</h2>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/pradyunsg/furo/commit/1bbf4ee4f65c488b9a0f577b8205255338a64c4d"><code>1bbf4ee</code></a>
Prepare release: 2024.08.06</li>
<li><a
href="https://github.com/pradyunsg/furo/commit/bcb22c381dc13c76abe37ff5939591fd943e0af6"><code>bcb22c3</code></a>
Update changelog</li>
<li><a
href="https://github.com/pradyunsg/furo/commit/e633f028ccb0fa4036df0dac67feec50194edb36"><code>e633f02</code></a>
Improve the selector for sidebar</li>
<li><a
href="https://github.com/pradyunsg/furo/commit/d2fa2e0b1c0989bcca79731504b55957e8bec706"><code>d2fa2e0</code></a>
[pre-commit.ci] pre-commit autoupdate (<a
href="https://redirect.github.com/pradyunsg/furo/issues/821">#821</a>)</li>
<li><a
href="https://github.com/pradyunsg/furo/commit/05a2d63a6cfd123db27e764f3b53be7029adccd4"><code>05a2d63</code></a>
Add smoother transitions between breakpoints</li>
<li><a
href="https://github.com/pradyunsg/furo/commit/d261d3b49ddbe010f86e13f450f9e10cdaef24db"><code>d261d3b</code></a>
[pre-commit.ci] pre-commit autoupdate (<a
href="https://redirect.github.com/pradyunsg/furo/issues/810">#810</a>)</li>
<li><a
href="https://github.com/pradyunsg/furo/commit/2d3b6baa3371451d997d879a0aa61b3592ade638"><code>2d3b6ba</code></a>
Add support for Sphinx 8</li>
<li><a
href="https://github.com/pradyunsg/furo/commit/bf98041e02238ba559d749ac9a2e332c86da0876"><code>bf98041</code></a>
Increase specificity of table-wrapper selector</li>
<li><a
href="https://github.com/pradyunsg/furo/commit/fc6337c15e6f0cd080b5d395713e6ce7c27ecfc8"><code>fc6337c</code></a>
Fix the figures</li>
<li><a
href="https://github.com/pradyunsg/furo/commit/fd3f422a0f30b3a2a9a57118532aabed59596d1e"><code>fd3f422</code></a>
Avoid page breaks inside paragraphs</li>
<li>Additional commits viewable in <a
href="https://github.com/pradyunsg/furo/compare/2024.07.18...2024.08.06">compare
view</a></li>
</ul>
</details>
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