build(deps): bump virtualenv in /.github/workflows (#18)

Bumps [virtualenv](https://github.com/pypa/virtualenv) from 20.10.0 to 20.11.2.
- [Release notes](https://github.com/pypa/virtualenv/releases)
- [Changelog](https://github.com/pypa/virtualenv/blob/main/docs/changelog.rst)
- [Commits](pypa/virtualenv@20.10.0...20.11.2)

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

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

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

Author: dependabot[bot]

.github/workflows/constraints.txt

@@ -2,5 +2,5 @@ pip==21.3.1
 nox==2021.10.1
 nox-poetry==0.9.0
 poetry==1.1.12
-virtualenv==20.10.0
+virtualenv==20.11.2
 poetry-dynamic-versioning==0.13.1