Bump virtualenv from 20.13.4 to 20.14.0 in /.github/workflows (#245)

Bumps [virtualenv](https://github.com/pypa/virtualenv) from 20.13.4 to 20.14.0.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/pypa/virtualenv/blob/20.14.0/docs/changelog.rst">virtualenv's changelog</a>.</em></p>
<blockquote>
<h2>v20.14.0 (2022-03-25)</h2>
<p>Features - 20.14.0</p>
<pre><code>- Support Nushell activation scripts with nu version ``0.60`` - by :user:`kubouch`. (`[#2321](pypa/virtualenv#2321) &lt;https://github.com/pypa/virtualenv/issues/2321&gt;`_)
<p>Bugfixes - 20.14.0
</code></pre></p>
<ul>
<li>Improve performance of python startup inside created virtualenvs - by :user:<code>asottile</code>. (<code>[#2317](pypa/virtualenv#2317) &lt;https://github.com/pypa/virtualenv/issues/2317&gt;</code>_)</li>
<li>Upgrade embedded setuptools to <code>60.10.0</code> from <code>60.9.3</code> - by :user:<code>gaborbernat</code>. (<code>[#2320](pypa/virtualenv#2320) &lt;https://github.com/pypa/virtualenv/issues/2320&gt;</code>_)</li>
<li>Upgrade embedded setuptools to <code>61.0.0</code> from <code>60.10.0</code> - by :user:<code>gaborbernat</code>. (<code>[#2322](pypa/virtualenv#2322) &lt;https://github.com/pypa/virtualenv/issues/2322&gt;</code>_)</li>
</ul>
<h2>v20.13.3 (2022-03-07)</h2>
<p>Bugfixes - 20.13.3</p>
<pre><code>- Avoid symlinking the contents of ``/usr`` into PyPy3.8+ virtualenvs - by :user:`stefanor`. (`[#2310](pypa/virtualenv#2310) &lt;https://github.com/pypa/virtualenv/issues/2310&gt;`_)
- Bump embed pip from ``22.0.3`` to ``22.0.4`` - by :user:`gaborbernat`. (`[#2311](pypa/virtualenv#2311) &lt;https://github.com/pypa/virtualenv/issues/2311&gt;`_)
<h2>v20.13.2 (2022-02-24)</h2>
<p>Bugfixes - 20.13.2
</code></pre></p>
<ul>
<li>Upgrade embedded setuptools to <code>60.9.3</code> from <code>60.6.0</code> - by :user:<code>gaborbernat</code>. (<code>[#2306](pypa/virtualenv#2306) &lt;https://github.com/pypa/virtualenv/issues/2306&gt;</code>_)</li>
</ul>
<h2>v20.13.1 (2022-02-05)</h2>
<p>Bugfixes - 20.13.1</p>
<pre><code>- fix &quot;execv() arg 2 must contain only strings&quot; error on M1 MacOS (`[#2282](pypa/virtualenv#2282) &lt;https://github.com/pypa/virtualenv/issues/2282&gt;`_)
- Ugrade embedded setuptools to ``60.5.0`` from ``60.2.0`` - by :user:`asottile`. (`[#2289](pypa/virtualenv#2289) &lt;https://github.com/pypa/virtualenv/issues/2289&gt;`_)
- Upgrade embedded pip to ``22.0.3`` and setuptools to ``60.6.0`` - by :user:`gaborbernat` and :user:`asottile`. (`[#2294](pypa/virtualenv#2294) &lt;https://github.com/pypa/virtualenv/issues/2294&gt;`_)
<h2>v20.13.0 (2022-01-02)</h2>
<p>Features - 20.13.0
</code></pre></p>
<ul>
<li>Add downloaded wheel information in the relevant JSON embed file to
prevent additional downloads of the same wheel. - by :user:<code>mayeut</code>. (<code>[#2268](pypa/virtualenv#2268) &lt;https://github.com/pypa/virtualenv/issues/2268&gt;</code>_)</li>
</ul>
<p>Bugfixes - 20.13.0</p>

</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/pypa/virtualenv/commit/a731637cbaf2da326a8ce5c857e2e873ef1120ce"><code>a731637</code></a> release 20.14.0</li>
<li><a href="https://github.com/pypa/virtualenv/commit/04296970d44c5399ed84cd6008901bd1be96b20d"><code>0429697</code></a> Bump embeded setuptools to v61 (<a href="https://github-redirect.dependabot.com/pypa/virtualenv/issues/2322">#2322</a>)</li>
<li><a href="https://github.com/pypa/virtualenv/commit/ee018a3b2d6684f6965e5ddbf14ed7477627160e"><code>ee018a3</code></a> Update Nushell activation scripts to 0.60 (<a href="https://github-redirect.dependabot.com/pypa/virtualenv/issues/2321">#2321</a>)</li>
<li>See full diff in <a href="https://github.com/pypa/virtualenv/compare/20.13.4...20.14.0">compare view</a></li>
</ul>
</details>
<br />


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.github/workflows/constraints.txt

@@ -2,4 +2,4 @@ pip==22.0.4
 nox==2022.1.7
 nox-poetry==0.9.0
 poetry==1.1.13
-virtualenv==20.13.4
+virtualenv==20.14.0