Bump virtualenv from 20.13.0 to 20.13.3 in /.github/workflows

Bumps [virtualenv](https://github.com/pypa/virtualenv) from 20.13.0 to 20.13.3.
- [Release notes](https://github.com/pypa/virtualenv/releases)
- [Changelog](https://github.com/pypa/virtualenv/blob/main/docs/changelog.rst)
- [Commits](pypa/virtualenv@20.13.0...20.13.3)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/constraints.txt

@@ -2,4 +2,4 @@ pip==22.0.4
 nox==2022.1.7
 nox-poetry==0.9.0
 poetry==1.1.12
-virtualenv==20.13.0
+virtualenv==20.13.3