chore(deps): Bump virtualenv from 20.26.4 to 20.26.6

Bumps [virtualenv](https://github.com/pypa/virtualenv) from 20.26.4 to 20.26.6.
- [Release notes](https://github.com/pypa/virtualenv/releases)
- [Changelog](https://github.com/pypa/virtualenv/blob/main/docs/changelog.rst)
- [Commits](pypa/virtualenv@20.26.4...20.26.6)

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

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

requirements.txt

@@ -47,6 +47,6 @@ tomlkit==0.13.2 ; python_version == "3.8"
 trove-classifiers==2024.7.2 ; python_version == "3.8"
 urllib3==2.2.3 ; python_version == "3.8"
 userpath==1.9.2 ; python_version == "3.8"
-virtualenv==20.26.4 ; python_version == "3.8"
+virtualenv==20.26.6 ; python_version == "3.8"
 xattr==1.1.0 ; sys_platform == "darwin" and python_version == "3.8"
 zipp==3.20.2 ; python_version == "3.8"