Bump virtualenv from 20.35.3 to 20.35.4 (#286)

Bumps [virtualenv](https://github.com/pypa/virtualenv) from 20.35.3 to 20.35.4.
- [Release notes](https://github.com/pypa/virtualenv/releases)
- [Changelog](https://github.com/pypa/virtualenv/blob/main/docs/changelog.rst)
- [Commits](pypa/virtualenv@20.35.3...20.35.4)

---
updated-dependencies:
- dependency-name: virtualenv
  dependency-version: 20.35.4
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

development-requirements.txt

@@ -28,5 +28,5 @@ sphinxcontrib-qthelp==2.0.0
 sphinxcontrib-serializinghtml==2.0.0
 sphinxext-remoteliteralinclude==0.6.0
 twine==6.2.0
-virtualenv==20.35.3
+virtualenv==20.35.4
 wheel==0.46.1