Bump virtualenv from 21.4.2 to 21.4.3 (aio-libs#12909)

Bumps [virtualenv](https://github.com/pypa/virtualenv) from 21.4.2 to
21.4.3.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/pypa/virtualenv/releases">virtualenv's
releases</a>.</em></p>
<blockquote>
<h2>21.4.3</h2>
<!-- raw HTML omitted -->
<h2>What's Changed</h2>
<ul>
<li>ci: silence avoidable check workflow notices by <a
href="https://github.com/gaborbernat"><code>@​gaborbernat</code></a> in
<a
href="https://redirect.github.com/pypa/virtualenv/pull/3154">pypa/virtualenv#3154</a></li>
<li>Upgrade embedded pip/setuptools/wheel by <a
href="https://github.com/github-actions"><code>@​github-actions</code></a>[bot]
in <a
href="https://redirect.github.com/pypa/virtualenv/pull/3155">pypa/virtualenv#3155</a></li>
<li>Fish activator passes VIRTUAL_ENV through cygpath by <a
href="https://github.com/LuNoX"><code>@​LuNoX</code></a> in <a
href="https://redirect.github.com/pypa/virtualenv/pull/3161">pypa/virtualenv#3161</a></li>
<li>Stop exporting PS1 in bash activator by <a
href="https://github.com/karlhillx"><code>@​karlhillx</code></a> in <a
href="https://redirect.github.com/pypa/virtualenv/pull/3162">pypa/virtualenv#3162</a></li>
<li>Add wheel-0.47.0 to seed packages as mitigation of CVE-2026-24049 by
<a href="https://github.com/apophizzz"><code>@​apophizzz</code></a> in
<a
href="https://redirect.github.com/pypa/virtualenv/pull/3167">pypa/virtualenv#3167</a></li>
<li>🐛 fix(discovery): resolve base interpreter executable-only symlinks
by <a
href="https://github.com/gaborbernat"><code>@​gaborbernat</code></a> in
<a
href="https://redirect.github.com/pypa/virtualenv/pull/3166">pypa/virtualenv#3166</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a href="https://github.com/LuNoX"><code>@​LuNoX</code></a> made
their first contribution in <a
href="https://redirect.github.com/pypa/virtualenv/pull/3161">pypa/virtualenv#3161</a></li>
<li><a href="https://github.com/karlhillx"><code>@​karlhillx</code></a>
made their first contribution in <a
href="https://redirect.github.com/pypa/virtualenv/pull/3162">pypa/virtualenv#3162</a></li>
<li><a href="https://github.com/apophizzz"><code>@​apophizzz</code></a>
made their first contribution in <a
href="https://redirect.github.com/pypa/virtualenv/pull/3167">pypa/virtualenv#3167</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/pypa/virtualenv/compare/21.4.2...21.4.3">https://github.com/pypa/virtualenv/compare/21.4.2...21.4.3</a></p>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/pypa/virtualenv/blob/main/docs/changelog.rst">virtualenv's
changelog</a>.</em></p>
<blockquote>
<h1>Bugfixes - 21.4.3</h1>
<ul>
<li>
<p>Upgrade embedded wheels:</p>
<ul>
<li>pip to <code>26.1.2</code> from <code>26.1.1</code>
(:issue:<code>u</code>)</li>
</ul>
</li>
<li>
<p>Resolve executable-only symlinks when recording <code>home</code> and
<code>base-executable</code> in <code>pyvenv.cfg</code>, mirroring
CPython's
<code>getpath.realpath</code><code>python/cpython#115237</code>
binary locate the base stdlib (for example python-build-standalone); a
fully symlinked interpreter tree is kept as-is</p>
<ul>
<li>by :user:<code>gaborbernat</code>. (:issue:<code>3157</code>)</li>
</ul>
</li>
<li>
<p>Stop exporting <code>PS1</code> from the bash activator so child
processes do not inherit shell prompt state.
(:issue:<code>3158</code>)</p>
</li>
<li>
<p>Handle CYGWIN/MSYS/MINGW path conversions in fish activation script -
by user::<code>LuNoX</code>. (:issue:<code>3160</code>)</p>
</li>
</ul>
<hr />
<p>v21.4.2 (2026-05-31)</p>
<hr />
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/pypa/virtualenv/commit/134b080fae08c8eac719750d21c3449d3aa02aaa"><code>134b080</code></a>
release 21.4.3</li>
<li><a
href="https://github.com/pypa/virtualenv/commit/2a36128bef8914ad006b49e5f1e2ca431dafa1cf"><code>2a36128</code></a>
🐛 fix(discovery): resolve base interpreter executable-only symlinks (<a
href="https://redirect.github.com/pypa/virtualenv/issues/3166">#3166</a>)</li>
<li><a
href="https://github.com/pypa/virtualenv/commit/5389c25cf4a1ee11ea55183d6daf4c8055dc3060"><code>5389c25</code></a>
Add wheel-0.47.0 to seed packages as mitigation of CVE-2026-24049 (<a
href="https://redirect.github.com/pypa/virtualenv/issues/3167">#3167</a>)</li>
<li><a
href="https://github.com/pypa/virtualenv/commit/0134feeec7ba0bd1a6193dc6245934ee5e800774"><code>0134fee</code></a>
chore(deps): bump astral-sh/setup-uv from 8.1.0 to 8.2.0 (<a
href="https://redirect.github.com/pypa/virtualenv/issues/3165">#3165</a>)</li>
<li><a
href="https://github.com/pypa/virtualenv/commit/af1ed9fd10b67adbcfd9f9e542fdc5bfcdd6ea5b"><code>af1ed9f</code></a>
chore(deps): bump actions/checkout from 6.0.2 to 6.0.3 (<a
href="https://redirect.github.com/pypa/virtualenv/issues/3164">#3164</a>)</li>
<li><a
href="https://github.com/pypa/virtualenv/commit/1b00ec8d284752f893e63fc752535cd7dc14b0c8"><code>1b00ec8</code></a>
[pre-commit.ci] pre-commit autoupdate (<a
href="https://redirect.github.com/pypa/virtualenv/issues/3163">#3163</a>)</li>
<li><a
href="https://github.com/pypa/virtualenv/commit/ce9729edbfc5b2f5fa2800def1ccc8e7c2d0f0be"><code>ce9729e</code></a>
Stop exporting PS1 in bash activator (<a
href="https://redirect.github.com/pypa/virtualenv/issues/3162">#3162</a>)</li>
<li><a
href="https://github.com/pypa/virtualenv/commit/9e6f59fb2fbd96aba220f5858ae7114aeb353c65"><code>9e6f59f</code></a>
Fish activator passes VIRTUAL_ENV through cygpath (<a
href="https://redirect.github.com/pypa/virtualenv/issues/3161">#3161</a>)</li>
<li><a
href="https://github.com/pypa/virtualenv/commit/a423028aa00bccb071efb72469f4dc0f05b27cfa"><code>a423028</code></a>
[pre-commit.ci] pre-commit autoupdate (<a
href="https://redirect.github.com/pypa/virtualenv/issues/3156">#3156</a>)</li>
<li><a
href="https://github.com/pypa/virtualenv/commit/f838c2120a0399dd2e2dec1ff38218672c7c8af8"><code>f838c21</code></a>
Upgrade embedded pip/setuptools/wheel (<a
href="https://redirect.github.com/pypa/virtualenv/issues/3155">#3155</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/pypa/virtualenv/compare/21.4.2...21.4.3">compare
view</a></li>
</ul>
</details>
<br />

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements/constraints.txt

@@ -329,7 +329,7 @@ uvloop==0.22.1 ; platform_system != "Windows"
     #   -r requirements/lint.in
 valkey==6.1.1
     # via -r requirements/lint.in
-virtualenv==21.4.2
+virtualenv==21.4.3
     # via pre-commit
 wait-for-it==2.3.0
     # via -r requirements/test-common-base.in

requirements/dev.txt

@@ -319,7 +319,7 @@ uvloop==0.22.1 ; platform_system != "Windows" and implementation_name == "cpytho
     #   -r requirements/lint.in
 valkey==6.1.1
     # via -r requirements/lint.in
-virtualenv==21.4.2
+virtualenv==21.4.3
     # via pre-commit
 wait-for-it==2.3.0
     # via -r requirements/test-common-base.in

requirements/lint.txt

@@ -164,7 +164,7 @@ uvloop==0.22.1 ; platform_system != "Windows"
     # via -r requirements/lint.in
 valkey==6.1.1
     # via -r requirements/lint.in
-virtualenv==21.4.2
+virtualenv==21.4.3
     # via pre-commit
 yarl==1.24.2
     # via aiohttp