ci: bump virtualenv from 20.25.1 to 20.25.2 in /.github/workflows

Bumps [virtualenv](https://github.com/pypa/virtualenv) from 20.25.1 to 20.25.2.
- [Release notes](https://github.com/pypa/virtualenv/releases)
- [Changelog](https://github.com/pypa/virtualenv/blob/main/docs/changelog.rst)
- [Commits](pypa/virtualenv@20.25.1...20.25.2)

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

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

Author: dependabot[bot]

.github/workflows/constraints.txt

@@ -2,6 +2,6 @@ pip==24.0.0
 nox==2024.4.15
 nox-poetry==1.0.3
 poetry==1.8.2
-virtualenv==20.25.1
+virtualenv==20.25.2
 poetry-dynamic-versioning==1.2.0
 toml==0.10.2