build(deps): Bump mkdocs-section-index from 0.3.5 to 0.3.8 in /docs (#1430)

Bumps
[mkdocs-section-index](https://github.com/oprypin/mkdocs-section-index)
from 0.3.5 to 0.3.8.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/oprypin/mkdocs-section-index/releases">mkdocs-section-index's
releases</a>.</em></p>
<blockquote>
<h2>v0.3.8</h2>
<ul>
<li>Adapt template rewrite path to MkDocs-Material 9.4 - <a
href="https://redirect.github.com/oprypin/mkdocs-section-index/issues/20">#20</a></li>
</ul>
<h2>v0.3.7</h2>
<ul>
<li><a
href="https://github.com/oprypin/mkdocs-section-index/commit/0ee7339c5196f64691b79ecb9abe8891254bd9f1">Declare
that 'nature' theme is supported</a> - <a
href="https://redirect.github.com/oprypin/mkdocs-section-index/issues/19">#19</a></li>
<li><a
href="https://github.com/oprypin/mkdocs-section-index/commit/9bbe1bcf1f8d70043e9c43f9523ef611ee4642c1">Fix
setting the parent of a SectionPage</a> - this was resulting in
incorrect &quot;breadcrumbs&quot; display in &quot;readthedocs&quot;
theme</li>
</ul>
<h2>v0.3.6</h2>
<ul>
<li>Adapt to mkdocs-material version 9.2 -
46dd8e72d5abcf2bb10b306556ddd31c5ec04172, <a
href="https://redirect.github.com/oprypin/mkdocs-section-index/issues/18">#18</a></li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/oprypin/mkdocs-section-index/commit/2f02c385376de433ac7470e5f6a92f2f36afce1d"><code>2f02c38</code></a>
v0.3.8</li>
<li><a
href="https://github.com/oprypin/mkdocs-section-index/commit/8adc20022ea2725a68e2bdb91d8fc6a2812bc97c"><code>8adc200</code></a>
Adapt template rewrite path to MkDocs-Material 9.4 (<a
href="https://redirect.github.com/oprypin/mkdocs-section-index/issues/20">#20</a>)</li>
<li><a
href="https://github.com/oprypin/mkdocs-section-index/commit/e1d5a22cfc6c4885127604deb42575eced7266c1"><code>e1d5a22</code></a>
Add a workflow to deploy a PyPI release on tag</li>
<li><a
href="https://github.com/oprypin/mkdocs-section-index/commit/c5bafa505b64841615b6c33f3b4acf35783b363f"><code>c5bafa5</code></a>
Add built-in search plugin to config example (<a
href="https://redirect.github.com/oprypin/mkdocs-section-index/issues/14">#14</a>)</li>
<li><a
href="https://github.com/oprypin/mkdocs-section-index/commit/32e433f6f8387b9c645378462b3d34ccf4898782"><code>32e433f</code></a>
v0.3.7</li>
<li><a
href="https://github.com/oprypin/mkdocs-section-index/commit/9bbe1bcf1f8d70043e9c43f9523ef611ee4642c1"><code>9bbe1bc</code></a>
Fix setting the parent of a SectionPage</li>
<li><a
href="https://github.com/oprypin/mkdocs-section-index/commit/0ee7339c5196f64691b79ecb9abe8891254bd9f1"><code>0ee7339</code></a>
Declare that 'nature' theme is supported</li>
<li><a
href="https://github.com/oprypin/mkdocs-section-index/commit/b810a873289e2a58bf888486f5eb77c34a49ddae"><code>b810a87</code></a>
Switch to &quot;ruff&quot; linter, enable many of its rules</li>
<li><a
href="https://github.com/oprypin/mkdocs-section-index/commit/8c064b04fc1e0eeeed60f3c671c9e0f7eb834654"><code>8c064b0</code></a>
v0.3.6</li>
<li><a
href="https://github.com/oprypin/mkdocs-section-index/commit/8a660ab6356c2e002e92b4d9a83a1755b5065ba8"><code>8a660ab</code></a>
Fix minimal deps</li>
<li>Additional commits viewable in <a
href="https://github.com/oprypin/mkdocs-section-index/compare/v0.3.5...v0.3.8">compare
view</a></li>
</ul>
</details>
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docs/requirements.txt

@@ -1,4 +1,4 @@
 mkdocs==1.5.2
 mkdocs-glightbox==0.3.4
 mkdocs-material==9.2.7
-mkdocs-section-index==0.3.5
+mkdocs-section-index==0.3.8