Update tox requirement from ==4.21.* to ==4.22.*

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---

Updates the requirements on tox to permit the latest version.

Changelog

Sourced from tox's changelog.

v4.22.0 (2024-10-15)

Features - 4.22.0

- Implement dependency group support as defined in :pep:`735` - see :ref:`dependency_groups` - by :user:`gaborbernat`. (:issue:`3408`)
v4.21.2 (2024-10-03)
Bugfixes - 4.21.2

• Include tox.toml in sdist archives to fix test failures resulting from its lack.
  • by :user:mgorny (:issue:3389)

v4.21.1 (2024-10-02)

Bugfixes - 4.21.1

- Fix error when using ``requires`` within a TOML configuration file - by :user:`gaborbernat`. (:issue:`3386`)
- Fix error when using ``deps`` within a TOML configuration file - by :user:`gaborbernat`. (:issue:`3387`)
- Multiple fixes for the TOML configuration by :user:`gaborbernat`.:

Do not fail when there is an empty command within commands.
Allow references for set_env by accepting list of dictionaries for it.
Do not try to be smart about reference unrolling, instead allow the user to control it via the extend flag,
available both for posargs and ref replacements.
The ref replacements raw key has been renamed to of. (:issue:3388)

v4.21.0 (2024-09-30)
Features - 4.21.0

• Native TOML configuration support - by :user:gaborbernat. (:issue:999)

Improved Documentation - 4.21.0

- Update Loader docs - by :user:ziima (:issue:`3352`)
v4.20.0 (2024-09-18)
Features - 4.20.0
- Separate the list dependencies functionality to a separate abstract class allowing code reuse in plugins (such as
  ``tox-uv``) - by :gaborbernat`. (:issue:`3347`)
v4.19.0 (2024-09-17)

</tr></table>

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<p>... (truncated)</p>

</details>

<details>

<summary>Commits</summary>
<ul>

<li><a href="https://github.com/tox-dev/tox/commit/b912cb2383c3b8e6e3fb09c80b774f4bf4c29bc0&quot;&gt;&lt;code&gt;b912cb2&lt;/code&gt;&lt;/a> release 4.22.0</li>

<li><a href="https://github.com/tox-dev/tox/commit/568b90f041b4f3ec05bbcf9fbcd6c51e87a8e6ed&quot;&gt;&lt;code&gt;568b90f&lt;/code&gt;&lt;/a> Add dependency-groups support (PEP-735) (<a href="https://redirect.github.com/tox-dev/tox/issues/3409&quot;&gt;#3409&lt;/a&gt;)&lt;/li>

<li><a href="https://github.com/tox-dev/tox/commit/f919d0d0d512a755f0f85af540ed75f73140a685&quot;&gt;&lt;code&gt;f919d0d&lt;/code&gt;&lt;/a> Expose type checking dependencies into an extra (<a href="https://redirect.github.com/tox-dev/tox/issues/3404&quot;&gt;#3404&lt;/a&gt;)&lt;/li>

<li><a href="https://github.com/tox-dev/tox/commit/7c0e3eda9787fe9bcc134dfe21d6d9b604cf7ef1&quot;&gt;&lt;code&gt;7c0e3ed&lt;/code&gt;&lt;/a> [pre-commit.ci] pre-commit autoupdate (<a href="https://redirect.github.com/tox-dev/tox/issues/3406&quot;&gt;#3406&lt;/a&gt;)&lt;/li>

<li><a href="https://github.com/tox-dev/tox/commit/6db3730e0bf8de7a09d9e3328c24ff4e26474757&quot;&gt;&lt;code&gt;6db3730&lt;/code&gt;&lt;/a> Fix the fix environment definition (<a href="https://redirect.github.com/tox-dev/tox/issues/3407&quot;&gt;#3407&lt;/a&gt;)&lt;/li>

<li><a href="https://github.com/tox-dev/tox/commit/2bf065a7979f98a0c7181b667d566622c68d0567&quot;&gt;&lt;code&gt;2bf065a&lt;/code&gt;&lt;/a> Bump pypa/gh-action-pypi-publish from 1.10.2 to 1.10.3 (<a href="https://redirect.github.com/tox-dev/tox/issues/3392&quot;&gt;#3392&lt;/a&gt;)&lt;/li>

<li><a href="https://github.com/tox-dev/tox/commit/eb599af235f88c8853e39f5b76b1079b83818255&quot;&gt;&lt;code&gt;eb599af&lt;/code&gt;&lt;/a> [pre-commit.ci] pre-commit autoupdate (<a href="https://redirect.github.com/tox-dev/tox/issues/3395&quot;&gt;#3395&lt;/a&gt;)&lt;/li>

<li><a href="https://github.com/tox-dev/tox/commit/c953f4f4ba1e0e7a69de1ecea94e4bdb5a797ac1&quot;&gt;&lt;code&gt;c953f4f&lt;/code&gt;&lt;/a> release 4.21.2</li>

<li><a href="https://github.com/tox-dev/tox/commit/3ab1d3e559ebea0dac8ae34262158c7234e44997&quot;&gt;&lt;code&gt;3ab1d3e&lt;/code&gt;&lt;/a> Update sdist rules to include <code>tox.toml</code> (<a href="https://redirect.github.com/tox-dev/tox/issues/3389&quot;&gt;#3389&lt;/a>) (<a href="https://redirect.github.com/tox-dev/tox/issues/3390&quot;&gt;#3390&lt;/a&gt;)&lt;/li>

<li><a href="https://github.com/tox-dev/tox/commit/172a952f2acf66cfab69558325217a52b387446a&quot;&gt;&lt;code&gt;172a952&lt;/code&gt;&lt;/a> Fix user guide typo</li>

<li>Additional commits viewable in <a href="https://github.com/tox-dev/tox/compare/4.21.0...4.22.0&quot;&gt;compare view</a></li>

</ul>

</details>
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