fix new upload action

Author: tillsteinbach

.github/workflows/build.yml

@@ -44,5 +44,5 @@ jobs:
     - name: Archive code coverage results
       uses: actions/upload-artifact@v4
       with:
-        name: code-coverage-report
+        name: code-coverage-report-${{ matrix.os }}-${{ matrix.python-version }}
         path: coverage_html_report/**