Build: Bump pandas from 2.3.0 to 2.3.1 (#2181)

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Bumps [pandas](https://github.com/pandas-dev/pandas) from 2.3.0 to
2.3.1.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/pandas-dev/pandas/releases">pandas's
releases</a>.</em></p>
<blockquote>
<h2>Pandas 2.3.1</h2>
<p>We are pleased to announce the release of pandas 2.3.1.
This release includes some improvements and fixes to the future string
data type (preview feature for the upcoming pandas 3.0). We recommend
that all users upgrade to this version.</p>
<p>See the <a
href="https://pandas.pydata.org/pandas-docs/version/2.3.1/whatsnew/v2.3.1.html">full
whatsnew</a> for a list of all the changes.
Pandas 2.3.1 supports Python 3.9 and higher.</p>
<p>The release will be available on the conda-forge channel:</p>
<pre><code>conda install pandas --channel conda-forge
</code></pre>
<p>Or via PyPI:</p>
<pre><code>python3 -m pip install --upgrade pandas
</code></pre>
<p>Please report any issues with the release on the <a
href="https://github.com/pandas-dev/pandas/issues">pandas issue
tracker</a>.</p>
<p>Thanks to all the contributors who made this release possible.</p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/pandas-dev/pandas/commit/c888af6d0bb674932007623c0867e1fbd4bdc2c6"><code>c888af6</code></a>
RLS: 2.3.1</li>
<li><a
href="https://github.com/pandas-dev/pandas/commit/6aea30263edd6817a3ce609c263bd33ce59e5f0a"><code>6aea302</code></a>
Backport PR <a
href="https://redirect.github.com/pandas-dev/pandas/issues/61794">#61794</a>
on branch 2.3.x (DOC: prepare 2.3.1 whatsnew notes for rel...</li>
<li><a
href="https://github.com/pandas-dev/pandas/commit/a160ae615fc72e709f3244314f2432706c685355"><code>a160ae6</code></a>
[backport 2.3.x] BUG[string]: incorrect index downcast in DataFrame.join
(<a
href="https://redirect.github.com/pandas-dev/pandas/issues/61">#61</a>...</li>
<li><a
href="https://github.com/pandas-dev/pandas/commit/cf5db68cd1496339802f9b7694ab67913e9fb62b"><code>cf5db68</code></a>
[backport 2.3.x] TST: update expected dtype for sum of decimals with
pyarrow ...</li>
<li><a
href="https://github.com/pandas-dev/pandas/commit/50ad136c5e91b4cf00216bc55028711635e66169"><code>50ad136</code></a>
Backport PR <a
href="https://redirect.github.com/pandas-dev/pandas/issues/61795">#61795</a>
on branch 2.3.x (DOC: add section about upcoming pandas 3....</li>
<li><a
href="https://github.com/pandas-dev/pandas/commit/6c762f32575ad3cafe35a4483f8a84ece9e38d5d"><code>6c762f3</code></a>
Backport PR <a
href="https://redirect.github.com/pandas-dev/pandas/issues/61770">#61770</a>
on branch 2.3.x (BUG: Fix unpickling of string dtypes of l...</li>
<li><a
href="https://github.com/pandas-dev/pandas/commit/fd99ef70c981fbdd3a5adb8ab3587d369b494353"><code>fd99ef7</code></a>
Backport PR <a
href="https://redirect.github.com/pandas-dev/pandas/issues/61705">#61705</a>
on branch 2.3.x (DOC: add pandas 3.0 migration guide for t...</li>
<li><a
href="https://github.com/pandas-dev/pandas/commit/4e5237db60942cb09f6252ef9f79086704128f41"><code>4e5237d</code></a>
[backport 2.3.x] CI: clean up wheel build workarounds now that Cython
3.1.0 i...</li>
<li><a
href="https://github.com/pandas-dev/pandas/commit/4d42cd8e7e90a21b61a0f55cd07a21b40b30a599"><code>4d42cd8</code></a>
Revert &quot;[2.3.x] DEPS: Drop Python 3.9 (<a
href="https://redirect.github.com/pandas-dev/pandas/issues/60792">#60792</a>)&quot;
(<a
href="https://redirect.github.com/pandas-dev/pandas/issues/61755">#61755</a>)</li>
<li><a
href="https://github.com/pandas-dev/pandas/commit/5d32ae99292f3d5c770b65912c8b113fafb2db57"><code>5d32ae9</code></a>
BLD: Build wheels for 3.9 and musllinux-aarch64 for pandas 2.3 (<a
href="https://redirect.github.com/pandas-dev/pandas/issues/61569">#61569</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/pandas-dev/pandas/compare/v2.3.0...v2.3.1">compare
view</a></li>
</ul>
</details>
<br />


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