chore(deps): update jinja2 requirement from <4,>=3.1 to >=3.1.6,<4 in /docs (#21606)

Updates the requirements on [jinja2](https://github.com/pallets/jinja)
to permit the latest version.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/pallets/jinja/releases">jinja2's
releases</a>.</em></p>
<blockquote>
<h2>3.1.6</h2>
<p>This is the Jinja 3.1.6 security release, which fixes security issues
but does not otherwise change behavior and should not result in breaking
changes compared to the latest feature release.</p>
<p>PyPI: <a
href="https://pypi.org/project/Jinja2/3.1.6/">https://pypi.org/project/Jinja2/3.1.6/</a>
Changes: <a
href="https://jinja.palletsprojects.com/en/stable/changes/#version-3-1-6">https://jinja.palletsprojects.com/en/stable/changes/#version-3-1-6</a></p>
<ul>
<li>The <code>|attr</code> filter does not bypass the environment's
attribute lookup, allowing the sandbox to apply its checks. <a
href="https://github.com/pallets/jinja/security/advisories/GHSA-cpwx-vrp4-4pq7">https://github.com/pallets/jinja/security/advisories/GHSA-cpwx-vrp4-4pq7</a></li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/pallets/jinja/blob/main/CHANGES.rst">jinja2's
changelog</a>.</em></p>
<blockquote>
<h2>Version 3.1.6</h2>
<p>Released 2025-03-05</p>
<ul>
<li>The <code>|attr</code> filter does not bypass the environment's
attribute lookup,
allowing the sandbox to apply its checks.
:ghsa:<code>cpwx-vrp4-4pq7</code></li>
</ul>
<h2>Version 3.1.5</h2>
<p>Released 2024-12-21</p>
<ul>
<li>The sandboxed environment handles indirect calls to
<code>str.format</code>, such as
by passing a stored reference to a filter that calls its argument.
:ghsa:<code>q2x7-8rv6-6q7h</code></li>
<li>Escape template name before formatting it into error messages, to
avoid
issues with names that contain f-string syntax.
:issue:<code>1792</code>, :ghsa:<code>gmj6-6f8f-6699</code></li>
<li>Sandbox does not allow <code>clear</code> and <code>pop</code> on
known mutable sequence
types. :issue:<code>2032</code></li>
<li>Calling sync <code>render</code> for an async template uses
<code>asyncio.run</code>.
:pr:<code>1952</code></li>
<li>Avoid unclosed <code>auto_aiter</code> warnings.
:pr:<code>1960</code></li>
<li>Return an <code>aclose</code>-able <code>AsyncGenerator</code> from
<code>Template.generate_async</code>. :pr:<code>1960</code></li>
<li>Avoid leaving <code>root_render_func()</code> unclosed in
<code>Template.generate_async</code>. :pr:<code>1960</code></li>
<li>Avoid leaving async generators unclosed in blocks, includes and
extends.
:pr:<code>1960</code></li>
<li>The runtime uses the correct <code>concat</code> function for the
current environment
when calling block references. :issue:<code>1701</code></li>
<li>Make <code>|unique</code> async-aware, allowing it to be used after
another
async-aware filter. :issue:<code>1781</code></li>
<li><code>|int</code> filter handles <code>OverflowError</code> from
scientific notation.
:issue:<code>1921</code></li>
<li>Make compiling deterministic for tuple unpacking in a <code>{% set
... %}</code>
call. :issue:<code>2021</code></li>
<li>Fix dunder protocol (<code>copy</code>/<code>pickle</code>/etc)
interaction with <code>Undefined</code>
objects. :issue:<code>2025</code></li>
<li>Fix <code>copy</code>/<code>pickle</code> support for the internal
<code>missing</code> object.
:issue:<code>2027</code></li>
<li><code>Environment.overlay(enable_async)</code> is applied correctly.
:pr:<code>2061</code></li>
<li>The error message from <code>FileSystemLoader</code> includes the
paths that were
searched. :issue:<code>1661</code></li>
<li><code>PackageLoader</code> shows a clearer error message when the
package does not
contain the templates directory. :issue:<code>1705</code></li>
<li>Improve annotations for methods returning copies.
:pr:<code>1880</code></li>
<li><code>urlize</code> does not add <code>mailto:</code> to values like
<code>@A@b</code>. :pr:<code>1870</code></li>
</ul>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/pallets/jinja/commit/15206881c006c79667fe5154fe80c01c65410679"><code>1520688</code></a>
release version 3.1.6</li>
<li><a
href="https://github.com/pallets/jinja/commit/90457bbf33b8662926ae65cdde4c4c32e756e403"><code>90457bb</code></a>
Merge commit from fork</li>
<li><a
href="https://github.com/pallets/jinja/commit/065334d1ee5b7210e1a0a93c37238c86858f2af7"><code>065334d</code></a>
attr filter uses env.getattr</li>
<li><a
href="https://github.com/pallets/jinja/commit/033c20015c7ca899ab52eb921bb0f08e6d3dd145"><code>033c200</code></a>
start version 3.1.6</li>
<li><a
href="https://github.com/pallets/jinja/commit/bc68d4efa99c5f77334f0e519628558059ae8c35"><code>bc68d4e</code></a>
use global contributing guide (<a
href="https://redirect.github.com/pallets/jinja/issues/2070">#2070</a>)</li>
<li><a
href="https://github.com/pallets/jinja/commit/247de5e0c5062a792eb378e50e13e692885ee486"><code>247de5e</code></a>
use global contributing guide</li>
<li><a
href="https://github.com/pallets/jinja/commit/ab8218c7a1b66b62e0ad6b941bd514e3a64a358f"><code>ab8218c</code></a>
use project advisory link instead of global</li>
<li><a
href="https://github.com/pallets/jinja/commit/b4ffc8ff299dfd360064bea4cd2f862364601ad2"><code>b4ffc8f</code></a>
release version 3.1.5 (<a
href="https://redirect.github.com/pallets/jinja/issues/2066">#2066</a>)</li>
<li><a
href="https://github.com/pallets/jinja/commit/877f6e51be8e1765b06d911cfaa9033775f051d1"><code>877f6e5</code></a>
release version 3.1.5</li>
<li><a
href="https://github.com/pallets/jinja/commit/8d588592653b052f957b720e1fc93196e06f207f"><code>8d58859</code></a>
remove test pypi</li>
<li>Additional commits viewable in <a
href="https://github.com/pallets/jinja/compare/3.1.0...3.1.6">compare
view</a></li>
</ul>
</details>
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docs/pyproject.toml

@@ -8,6 +8,6 @@ dependencies = [
   "pydata-sphinx-theme>=0.16,<1",
   "myst-parser>=5,<6",
   "maturin>=1.11,<2",
-  "jinja2>=3.1,<4",
+  "jinja2>=3.1.6,<4",
   "setuptools>=82,<83",
 ]