Bump sphinx from 7.1.0 to 7.1.1 (#7447)

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 7.1.0 to
7.1.1.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/sphinx-doc/sphinx/releases">sphinx's
releases</a>.</em></p>
<blockquote>
<h2>Sphinx 7.1.1</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/sphinx/blob/master/CHANGES">sphinx's
changelog</a>.</em></p>
<blockquote>
<h1>Release 7.1.1 (released Jul 27, 2023)</h1>
<h2>Bugs fixed</h2>
<ul>
<li><a
href="https://redirect.github.com/sphinx-doc/sphinx/issues/11514">#11514</a>:
Fix <code>SOURCE_DATE_EPOCH</code> in multi-line copyright footer.
Patch by Bénédikt Tran.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/sphinx-doc/sphinx/commit/d8d73c16b8b86df8f1a32698229a2b818fea2e98"><code>d8d73c1</code></a>
Bump to 7.1.1 final</li>
<li><a
href="https://github.com/sphinx-doc/sphinx/commit/a54e630a21a6d9b7e80a22e969e3a86e35678d2d"><code>a54e630</code></a>
[internationalisation] Update message catalogues</li>
<li><a
href="https://github.com/sphinx-doc/sphinx/commit/8452300d54dce2da751941d9547dd54dc03e69bf"><code>8452300</code></a>
Fix multi-line copyright when <code>SOURCE_DATE_EPOCH</code> is set (<a
href="https://redirect.github.com/sphinx-doc/sphinx/issues/11524">#11524</a>)</li>
<li><a
href="https://github.com/sphinx-doc/sphinx/commit/fe08cec019c52c15b7f7365013134e3f3d1b3739"><code>fe08cec</code></a>
bump version</li>
<li>See full diff in <a
href="https://github.com/sphinx-doc/sphinx/compare/v7.1.0...v7.1.1">compare
view</a></li>
</ul>
</details>
<br />


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requirements/constraints.txt

@@ -183,7 +183,7 @@ slotscheck==0.16.5
     # via -r requirements/lint.txt
 snowballstemmer==2.1.0
     # via sphinx
-sphinx==7.1.0
+sphinx==7.1.1
     # via
     #   -r requirements/doc.txt
     #   sphinxcontrib-blockdiag

requirements/doc.txt

@@ -1,7 +1,7 @@
 aiohttp-theme==0.1.6
 # Temp fix till updated: https://github.com/blockdiag/blockdiag/pull/148
 funcparserlib==1.0.1
-sphinx==7.1.0
+sphinx==7.1.1
 sphinxcontrib-blockdiag==3.0.0
 sphinxcontrib-towncrier==0.3.2a0
 towncrier==23.6.0