Build(deps): Bump tox from 4.27.0 to 4.28.0 (#730)

Bumps [tox](https://github.com/tox-dev/tox) from 4.27.0 to 4.28.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/tox-dev/tox/releases">tox's
releases</a>.</em></p>
<blockquote>
<h2>4.28.0</h2>
<!-- raw HTML omitted -->
<h2>What's Changed</h2>
<ul>
<li>[pre-commit.ci] pre-commit autoupdate by <a
href="https://github.com/pre-commit-ci"><code>@​pre-commit-ci</code></a>[bot]
in <a
href="https://redirect.github.com/tox-dev/tox/pull/3548">tox-dev/tox#3548</a></li>
<li>[docs] Document how to require a plugin by <a
href="https://github.com/stephenfin"><code>@​stephenfin</code></a> in <a
href="https://redirect.github.com/tox-dev/tox/pull/3552">tox-dev/tox#3552</a></li>
<li>[pre-commit.ci] pre-commit autoupdate by <a
href="https://github.com/pre-commit-ci"><code>@​pre-commit-ci</code></a>[bot]
in <a
href="https://redirect.github.com/tox-dev/tox/pull/3554">tox-dev/tox#3554</a></li>
<li>[pre-commit.ci] pre-commit autoupdate by <a
href="https://github.com/pre-commit-ci"><code>@​pre-commit-ci</code></a>[bot]
in <a
href="https://redirect.github.com/tox-dev/tox/pull/3558">tox-dev/tox#3558</a></li>
<li>Add <code>[testenv] constraints</code> option by <a
href="https://github.com/stephenfin"><code>@​stephenfin</code></a> in <a
href="https://redirect.github.com/tox-dev/tox/pull/3556">tox-dev/tox#3556</a></li>
<li>[pre-commit.ci] pre-commit autoupdate by <a
href="https://github.com/pre-commit-ci"><code>@​pre-commit-ci</code></a>[bot]
in <a
href="https://redirect.github.com/tox-dev/tox/pull/3562">tox-dev/tox#3562</a></li>
<li>Allow disabling plugins on a one-off by <a
href="https://github.com/gaborbernat"><code>@​gaborbernat</code></a> in
<a
href="https://redirect.github.com/tox-dev/tox/pull/3560">tox-dev/tox#3560</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/tox-dev/tox/compare/4.27.0...4.28.0">https://github.com/tox-dev/tox/compare/4.27.0...4.28.0</a></p>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/tox-dev/tox/blob/main/docs/changelog.rst">tox's
changelog</a>.</em></p>
<blockquote>
<h2>v4.28.0 (2025-07-20)</h2>
<p>Features - 4.28.0</p>
<pre><code>- Added ``constraints`` to allow specifying constraints files
for all dependencies. (:issue:`3550`)
- Allow disabling tox plugins via the ``TOX_DISABLED_EXTERNAL_PLUGINS``
environment variable - by :user:`gaborbernat`. (:issue:`3468`)
<p>Improved Documentation - 4.28.0
</code></pre></p>
<ul>
<li>The <code>min_version</code>/<code>minversion</code> config option
is deprecated in favor of the <code>requires</code> option.
(:issue:<code>3553</code>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/tox-dev/tox/commit/af94e62e3ac401b4bd9e41b2e1b81cb395ca5502"><code>af94e62</code></a>
release 4.28.0</li>
<li><a
href="https://github.com/tox-dev/tox/commit/55af14a2fd71aa6442a9a027c6d59646e190e2ac"><code>55af14a</code></a>
Allow disabling plugins on a one-off (<a
href="https://redirect.github.com/tox-dev/tox/issues/3560">#3560</a>)</li>
<li><a
href="https://github.com/tox-dev/tox/commit/57b5dc611a123b2a25fd0b68b78054e03f1ee3c1"><code>57b5dc6</code></a>
[pre-commit.ci] pre-commit autoupdate (<a
href="https://redirect.github.com/tox-dev/tox/issues/3562">#3562</a>)</li>
<li><a
href="https://github.com/tox-dev/tox/commit/e2ff114a72e2d5e39338ed32ef662a742349e606"><code>e2ff114</code></a>
Add <code>[testenv] constraints</code> option (<a
href="https://redirect.github.com/tox-dev/tox/issues/3556">#3556</a>)</li>
<li><a
href="https://github.com/tox-dev/tox/commit/7138c382b84947195e6809d55de96d557db352e8"><code>7138c38</code></a>
[pre-commit.ci] pre-commit autoupdate (<a
href="https://redirect.github.com/tox-dev/tox/issues/3558">#3558</a>)</li>
<li><a
href="https://github.com/tox-dev/tox/commit/3c4497c988e1e4f90a7e29397fea57f026f9f713"><code>3c4497c</code></a>
[pre-commit.ci] pre-commit autoupdate (<a
href="https://redirect.github.com/tox-dev/tox/issues/3554">#3554</a>)</li>
<li><a
href="https://github.com/tox-dev/tox/commit/452c1746be27838697262491311e2dc6996e074a"><code>452c174</code></a>
[docs] Document how to require a plugin (<a
href="https://redirect.github.com/tox-dev/tox/issues/3552">#3552</a>)</li>
<li><a
href="https://github.com/tox-dev/tox/commit/cb8e0fbd27b9c017f29f5d22d05e5f8ade26853d"><code>cb8e0fb</code></a>
[pre-commit.ci] pre-commit autoupdate (<a
href="https://redirect.github.com/tox-dev/tox/issues/3548">#3548</a>)</li>
<li>See full diff in <a
href="https://github.com/tox-dev/tox/compare/4.27.0...4.28.0">compare
view</a></li>
</ul>
</details>
<br />


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Author: dependabot[bot]

requirements/ci-wheel.txt

@@ -2,4 +2,4 @@
 
 coverage==7.9.2
 pytest-cov==6.2.1
-tox==4.27.0
+tox==4.28.0