Bump pydantic from 2.6.2 to 2.6.3 (#988)

Bumps [pydantic](https://github.com/pydantic/pydantic) from 2.6.2 to
2.6.3.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/pydantic/pydantic/releases">pydantic's
releases</a>.</em></p>
<blockquote>
<h2>v2.6.3 2024-02-27</h2>
<h3>What's Changed</h3>
<h4>Packaging</h4>
<ul>
<li>Update <code>pydantic-settings</code> version in the docs by <a
href="https://github.com/hramezani"><code>@​hramezani</code></a> in <a
href="https://redirect.github.com/pydantic/pydantic/pull/8906">#8906</a></li>
</ul>
<h4>Fixes</h4>
<ul>
<li>Fix discriminated union schema gen bug by <a
href="https://github.com/sydney-runkle"><code>@​sydney-runkle</code></a>
in <a
href="https://redirect.github.com/pydantic/pydantic/pull/8904">#8904</a></li>
</ul>
<p>Full Changelog: <a
href="https://github.com/pydantic/pydantic/compare/v2.6.2...v2.6.3/">https://github.com/pydantic/pydantic/compare/v2.6.2...v2.6.3/</a></p>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/pydantic/pydantic/blob/main/HISTORY.md">pydantic's
changelog</a>.</em></p>
<blockquote>
<h2>v2.6.3 (2024-02-27)</h2>
<p><a
href="https://github.com/pydantic/pydantic/releases/tag/v2.6.3">GitHub
release</a></p>
<h3>What's Changed</h3>
<h4>Packaging</h4>
<ul>
<li>Update <code>pydantic-settings</code> version in the docs by <a
href="https://github.com/hramezani"><code>@​hramezani</code></a> in <a
href="https://redirect.github.com/pydantic/pydantic/pull/8906">#8906</a></li>
</ul>
<h4>Fixes</h4>
<ul>
<li>Fix discriminated union schema gen bug by <a
href="https://github.com/sydney-runkle"><code>@​sydney-runkle</code></a>
in <a
href="https://redirect.github.com/pydantic/pydantic/pull/8904">#8904</a></li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/pydantic/pydantic/commit/88451f3a09f6cc34e66fcb78f0e76755fc6a89bc"><code>88451f3</code></a>
prep for 2.6.3 release</li>
<li><a
href="https://github.com/pydantic/pydantic/commit/5c4ac0988d3c4195263b30a6b4925fb056736644"><code>5c4ac09</code></a>
Merge branch '2.6' of <a
href="https://github.com/pydantic/pydantic">https://github.com/pydantic/pydantic</a>
into 2.6</li>
<li><a
href="https://github.com/pydantic/pydantic/commit/6fcee87eb4627530483a4f7e4d23e6789b6cde5d"><code>6fcee87</code></a>
Fix discriminated union schema gen bug (<a
href="https://redirect.github.com/pydantic/pydantic/issues/8904">#8904</a>)</li>
<li><a
href="https://github.com/pydantic/pydantic/commit/a525a6433afab59d9111ea6d90a92029a6a2e693"><code>a525a64</code></a>
Update pydantic-settings docs (<a
href="https://redirect.github.com/pydantic/pydantic/issues/8906">#8906</a>)</li>
<li>See full diff in <a
href="https://github.com/pydantic/pydantic/compare/v2.6.2...v2.6.3">compare
view</a></li>
</ul>
</details>
<br />


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