build(deps): bump sphinxcontrib-htmlhelp from 2.0.5 to 2.0.6 in /docs/sphinx (#2084)

Bumps
[sphinxcontrib-htmlhelp](https://github.com/sphinx-doc/sphinxcontrib-htmlhelp)
from 2.0.5 to 2.0.6.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/sphinx-doc/sphinxcontrib-htmlhelp/releases">sphinxcontrib-htmlhelp's
releases</a>.</em></p>
<blockquote>
<h2>sphinxcontrib-htmlhelp 2.0.6</h2>
<p>Changelog: <a
href="https://www.sphinx-doc.org/en/master/changes.html">https://www.sphinx-doc.org/en/master/changes.html</a></p>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/sphinx-doc/sphinxcontrib-htmlhelp/blob/master/CHANGES">sphinxcontrib-htmlhelp's
changelog</a>.</em></p>
<blockquote>
<h1>Release 2.0.6 (2024-07-20)</h1>
<ul>
<li>Fix tests for Sphinx 7.4 and later.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/sphinx-doc/sphinxcontrib-htmlhelp/commit/49998fdc1e911048e35fbf6fe0f135a47d338214"><code>49998fd</code></a>
Bump to 2.0.6 final</li>
<li><a
href="https://github.com/sphinx-doc/sphinxcontrib-htmlhelp/commit/8c97fef6563b5aaafb5fde111c51d154d7a4fa99"><code>8c97fef</code></a>
Fix tests for Sphinx 7.4 (<a
href="https://redirect.github.com/sphinx-doc/sphinxcontrib-htmlhelp/issues/20">#20</a>)</li>
<li>See full diff in <a
href="https://github.com/sphinx-doc/sphinxcontrib-htmlhelp/compare/2.0.5...2.0.6">compare
view</a></li>
</ul>
</details>
<br />


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docs/sphinx/requirements.txt

diff --git a/docs/sphinx/requirements.txt b/docs/sphinx/requirements.txt
index af6763f..ae7521e 100644
--- a/docs/sphinx/requirements.txt
+++ b/docs/sphinx/requirements.txt
@@ -311,9 +311,9 @@
     --hash=sha256:6485d09629944511c893fa11355bda18b742b83a2b181f9a009f7e500595c90f \
     --hash=sha256:9893fd3f90506bc4b97bdb977ceb8fbd823989f4316b28c3841ec128544372d3
     # via sphinx
-sphinxcontrib-htmlhelp==2.0.5 \
-    --hash=sha256:0dc87637d5de53dd5eec3a6a01753b1ccf99494bd756aafecd74b4fa9e729015 \
-    --hash=sha256:393f04f112b4d2f53d93448d4bce35842f62b307ccdc549ec1585e950bc35e04
+sphinxcontrib-htmlhelp==2.0.6 \
+    --hash=sha256:1b9af5a2671a61410a868fce050cab7ca393c218e6205cbc7f590136f207395c \
+    --hash=sha256:c6597da06185f0e3b4dc952777a04200611ef563882e0c244d27a15ee22afa73
     # via sphinx
 sphinxcontrib-jquery==4.1 \
     --hash=sha256:1620739f04e36a2c779f1a131a2dfd49b2fd07351bf1968ced074365933abc7a \