Bump virtualenv from 20.7.2 to 20.8.1 in /.github/workflows

[dependabot]

Bumps virtualenv from 20.7.2 to 20.8.1.

Changelog

Sourced from virtualenv's changelog.

v20.8.1 (2021-09-24)

Bugfixes - 20.8.1

- Fixed a bug where while creating a venv on top of an existing one, without cleaning, when seeded
  wheel version mismatch occurred, multiple ``.dist-info`` directories may be present, confounding entrypoint
  discovery - by :user:`arcivanov` (`[#2185](https://github.com/pypa/virtualenv/issues/2185) <https://github.com/pypa/virtualenv/issues/2185>`_)
- Bump embed setuptools from ``58.0.4`` to ``58.1.0`` - by :user:`gaborbernat`. (`[#2195](https://github.com/pypa/virtualenv/issues/2195) <https://github.com/pypa/virtualenv/issues/2195>`_)
Misc - 20.8.1
- `[#2189](https://github.com/pypa/virtualenv/issues/2189) &lt;https://github.com/pypa/virtualenv/issues/2189&gt;`_
v20.8.0 (2021-09-16)

upgrade embedded setuptools to 58.0.4 from 57.4.0 and pip to 21.2.4 from 21.2.3
Add nushell activation script

</code></pre>

</blockquote>

</details>

<details>

<summary>Commits</summary>

<ul>

<li><a href="https://github.com/pypa/virtualenv/commit/433840821a5d2a2308eb84a53bac95efdfacbe7c&quot;&gt;&lt;code&gt;4338408&lt;/code&gt;&lt;/a> release 20.8.1</li>

<li><a href="https://github.com/pypa/virtualenv/commit/e13ea2a7c65f233df0bc526ae073c01747258de8&quot;&gt;&lt;code&gt;e13ea2a&lt;/code&gt;&lt;/a> During seeding properly uninstall present versions of the wheels (<a href="https://github-redirect.dependabot.com/pypa/virtualenv/issues/2186&quot;&gt;#2186&lt;/a&gt;)&lt;/li>

<li><a href="https://github.com/pypa/virtualenv/commit/3b9d95481a7bb8ce98bc3118416ba6cbbedf99b4&quot;&gt;&lt;code&gt;3b9d954&lt;/code&gt;&lt;/a> Bump embed setuptools to 58.1.0 (<a href="https://github-redirect.dependabot.com/pypa/virtualenv/issues/2195&quot;&gt;#2195&lt;/a&gt;)&lt;/li>

<li><a href="https://github.com/pypa/virtualenv/commit/40d2f1833bab94fa2cad852c5b9e31d42c66d570&quot;&gt;&lt;code&gt;40d2f18&lt;/code&gt;&lt;/a> Fail early instead of creating non-working env (<a href="https://github-redirect.dependabot.com/pypa/virtualenv/issues/2189&quot;&gt;#2189&lt;/a&gt;)&lt;/li>

<li><a href="https://github.com/pypa/virtualenv/commit/9e03c945fbf22cb1384d944f874180292c1018d4&quot;&gt;&lt;code&gt;9e03c94&lt;/code&gt;&lt;/a> [pre-commit.ci] pre-commit autoupdate (<a href="https://github-redirect.dependabot.com/pypa/virtualenv/issues/2192&quot;&gt;#2192&lt;/a&gt;)&lt;/li>

<li><a href="https://github.com/pypa/virtualenv/commit/2151d385094c4f320cd2484eb9bcf3272cea2cc3&quot;&gt;&lt;code&gt;2151d38&lt;/code&gt;&lt;/a> Improve prompt nushell (<a href="https://github-redirect.dependabot.com/pypa/virtualenv/issues/2190&quot;&gt;#2190&lt;/a&gt;)&lt;/li>

<li><a href="https://github.com/pypa/virtualenv/commit/d810ce1c0613d1b955576bca644335b7a00b5bc0&quot;&gt;&lt;code&gt;d810ce1&lt;/code&gt;&lt;/a> Merge pull request <a href="https://github-redirect.dependabot.com/pypa/virtualenv/issues/2184&quot;&gt;#2184&lt;/a> from pypa/release-20.8.0</li>

<li><a href="https://github.com/pypa/virtualenv/commit/c54c7efe172adb206c75cc1499cf8625b19064e8&quot;&gt;&lt;code&gt;c54c7ef&lt;/code&gt;&lt;/a> release 20.8.0</li>

<li><a href="https://github.com/pypa/virtualenv/commit/e0410cafc8feedf72562174dee983fc709a5a36e&quot;&gt;&lt;code&gt;e0410ca&lt;/code&gt;&lt;/a> Nushell activation scripts (<a href="https://github-redirect.dependabot.com/pypa/virtualenv/issues/2170&quot;&gt;#2170&lt;/a&gt;)&lt;/li>

<li><a href="https://github.com/pypa/virtualenv/commit/1cc503bfadc2c0e8c3ecac6c0a3f430ee601d9a0&quot;&gt;&lt;code&gt;1cc503b&lt;/code&gt;&lt;/a> Bump pip and setuptools (<a href="https://github-redirect.dependabot.com/pypa/virtualenv/issues/2183&quot;&gt;#2183&lt;/a&gt;)&lt;/li>

<li>Additional commits viewable in <a href="https://github.com/pypa/virtualenv/compare/20.7.2...20.8.1&quot;&gt;compare view</a></li>

</ul>

</details>
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