ci: bump virtualenv from 20.26.6 to 20.27.0 in /.github/workflows (#182)

Author: dependabot[bot]

.github/workflows/constraints.txt

@@ -2,6 +2,6 @@ pip==24.2
 nox==2024.10.9
 nox-poetry==1.0.3
 poetry==1.8.4
-virtualenv==20.26.6
+virtualenv==20.27.0
 poetry-dynamic-versioning==1.4.1
 toml==0.10.2