Bump virtualenv from 20.19.0 to 20.24.5 in /.github/workflows (#404)

Bumps [virtualenv](https://github.com/pypa/virtualenv) from 20.19.0 to 20.24.5.
- [Release notes](https://github.com/pypa/virtualenv/releases)
- [Changelog](https://github.com/pypa/virtualenv/blob/main/docs/changelog.rst)
- [Commits](pypa/virtualenv@20.19.0...20.24.5)

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

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

.github/workflows/constraints.txt

@@ -3,4 +3,4 @@ pip==23.0
 nox==2023.4.22
 nox-poetry==1.0.2
 poetry>=1.2.0
-virtualenv==20.19.0
+virtualenv==20.24.5