chore: bump virtualenv from 20.16.3 to 20.16.4 in /.github/workflows

Bumps [virtualenv](https://github.com/pypa/virtualenv) from 20.16.3 to 20.16.4.
- [Release notes](https://github.com/pypa/virtualenv/releases)
- [Changelog](https://github.com/pypa/virtualenv/blob/main/docs/changelog.rst)
- [Commits](pypa/virtualenv@20.16.3...20.16.4)

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

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

.github/workflows/resources/constraints.txt

@@ -1,3 +1,3 @@
 pip==22.2.2
 poetry==1.1.15
-virtualenv==20.16.3
+virtualenv==20.16.4