build(deps): bump virtualenv from 20.26.6 to 20.27.0 in /plc4py

Bumps [virtualenv](https://github.com/pypa/virtualenv) from 20.26.6 to 20.27.0.
- [Release notes](https://github.com/pypa/virtualenv/releases)
- [Changelog](https://github.com/pypa/virtualenv/blob/main/docs/changelog.rst)
- [Commits](pypa/virtualenv@20.26.6...20.27.0)

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

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

plc4py/requirements.txt

@@ -50,5 +50,5 @@ pytest-mock==3.14.0
 PyYAML==6.0.2
 requires==0.10.5
 typing_extensions==4.12.2
-virtualenv==20.26.6
+virtualenv==20.27.0
 xtyping==0.8.2