fix collectstatic step in ci job

Author: erdem

.github/workflows/ci.yml

@@ -53,4 +53,5 @@ jobs:
         run: poetry run black .
 
       - name: Collect static files
-        run: poetry run python manage.py collectstatic --noinput
+        run: poetry run python manage.py collectstatic --noinput
+        working-directory: demo/