Bump authlib from 1.6.6 to 1.6.7 in /libs/weaviate in the pip group across 1 directory (#259)

Bumps the pip group with 1 update in the /libs/weaviate directory:
[authlib](https://github.com/authlib/authlib).

Updates `authlib` from 1.6.6 to 1.6.7
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/authlib/authlib/releases">authlib's
releases</a>.</em></p>
<blockquote>
<h2>v1.6.7</h2>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/authlib/authlib/compare/v1.6.6...v1.6.7">https://github.com/authlib/authlib/compare/v1.6.6...v1.6.7</a></p>
<p>Set supported algorithms for the default <code>jwt</code>
instance.</p>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/authlib/authlib/blob/main/docs/changelog.rst">authlib's
changelog</a>.</em></p>
<blockquote>
<h1>Changelog</h1>
<p>.. meta::
:description: The full list of changes between each Authlib release.</p>
<p>Here you can see the full list of changes between each Authlib
release.</p>
<h2>Version 1.7.0</h2>
<p><strong>Unreleased</strong></p>
<ul>
<li>Add support for <code>OpenID Connect RP-Initiated Logout 1.0
&lt;https://openid.net/specs/openid-connect-rpinitiated-1_0.html&gt;</code>_.
See :ref:<code>specs/rpinitiated</code> for details.
:issue:<code>500</code></li>
<li>Per RFC 6749 Section 3.3, the <code>scope</code> parameter is now
optional at both
authorization and token endpoints.
<code>client.get_allowed_scope()</code> is called
to determine the default scope when omitted.
:issue:<code>845</code></li>
<li>Stop support for Python 3.9, start support Python 3.14.
:pr:<code>850</code></li>
<li>Allow <code>AuthorizationServerMetadata.validate()</code> to compose
with RFC extension classes.</li>
<li>Fix <code>expires_at=0</code> being incorrectly treated as
<code>None</code>. :issue:<code>530</code></li>
<li>Allow <code>ResourceProtector</code> decorator to be used without
parentheses. :issue:<code>604</code></li>
<li>Implement RFC9700 PKCE downgrade countermeasure.</li>
</ul>
<p>Upgrade Guide: :ref:<code>joserfc_upgrade</code>.</p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/authlib/authlib/commit/38e872a3f5b97d2658507acc8762a4e18adaa50e"><code>38e872a</code></a>
chore: release 1.6.7</li>
<li><a
href="https://github.com/authlib/authlib/commit/b87c32ed07b8ae7f805873e1c9cafd1016761df7"><code>b87c32e</code></a>
fix: remove &quot;none&quot; algorithm from default jwt instance</li>
<li>See full diff in <a
href="https://github.com/authlib/authlib/compare/v1.6.6...v1.6.7">compare
view</a></li>
</ul>
</details>
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