fix: django2x depedencies in 3.13

Author: namsnath

Diff for: .github/workflows/website-test.yml

@@ -82,6 +82,11 @@ jobs:
           source venv/bin/activate
           make with-django2x
 
+          # Django2 uses `cgi`, deprecated in 3.13
+          if [ ${{ matrix.py-version == '3.13' }} ]; then
+            pip install legacy-cgi
+          fi
+
           export PYTHONPATH="${PYTHONPATH}:$(pwd)"
           cd tests/frontendIntegration/django2x