Bump virtualenv from 20.20.0 to 20.24.7 in /.github/workflows

Bumps [virtualenv](https://github.com/pypa/virtualenv) from 20.20.0 to 20.24.7.
- [Release notes](https://github.com/pypa/virtualenv/releases)
- [Changelog](https://github.com/pypa/virtualenv/blob/20.24.7/docs/changelog.rst)
- [Commits](pypa/virtualenv@20.20.0...20.24.7)

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

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

.github/workflows/constraints.txt

@@ -2,4 +2,4 @@ pip==23.2
 nox==2023.4.22
 nox-poetry==1.0.2
 poetry==1.4.0
-virtualenv==20.20.0
+virtualenv==20.24.7