Merge pull request #461 from robbievanleeuwen/dependabot/pip/dot-github/workflows/virtualenv-20.26.6

Bump virtualenv from 20.26.3 to 20.26.6 in /.github/workflows

Author: robbievanleeuwen

.github/workflows/constraints.txt

@@ -2,4 +2,4 @@ pip==24.2
 nox==2024.4.15
 nox-poetry==1.0.3
 poetry==1.8.3
-virtualenv==20.26.3
+virtualenv==20.26.6