ci: bump virtualenv from 20.27.1 to 20.35.4 in /.github/workflows

Bumps [virtualenv](https://github.com/pypa/virtualenv) from 20.27.1 to 20.35.4.
- [Release notes](https://github.com/pypa/virtualenv/releases)
- [Changelog](https://github.com/pypa/virtualenv/blob/main/docs/changelog.rst)
- [Commits](https://github.com/pypa/virtualenv/compare/20.27.1...20.35.4)

---
updated-dependencies:
- dependency-name: virtualenv
  dependency-version: 20.35.4
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/constraints.txt

@@ -2,5 +2,5 @@ pip==24.2
 nox==2024.10.9
 nox-poetry==1.0.3
 poetry==1.8.4
-virtualenv==20.27.1
+virtualenv==20.35.4
 toml==0.10.2