Force install venv module

Author: LKajan

.github/workflows/tests.yml

@@ -30,7 +30,7 @@ jobs:
 
       - name: Install dependencies
         run: |
-          pip3 install virtualenv
+          pip3 install virtualenv --break-system-packages
           virtualenv .venv --system-site-packages
           source .venv/bin/activate
           .venv/bin/pip install -qr requirements-dev.txt --no-deps