Upload coverage from all Python versions

Author: michaelosthege

.github/workflows/pipeline.yml

@@ -36,7 +36,6 @@ jobs:
         pytest -v --cov=./mcbackend --cov-report xml --cov-report term-missing mcbackend/
     - name: Upload coverage
       uses: codecov/codecov-action@v4
-      if: matrix.python-version == 3.11
       with:
         file: ./coverage.xml
         fail_ci_if_error: false