Fix upload of code coverage

Author: RasmusGOlsen

.github/workflows/ci.yml

@@ -70,6 +70,6 @@ jobs:
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v5
         with:
-          files: .tox/coverage.py$(echo ${{ matrix.python-version }} | tr -d .).xml
-          fail_ci_if_error: false
+          directory: .tox/
+          fail_ci_if_error: true
           token: ${{ secrets.CODECOV_TOKEN }}