fix coverage.yml

Author: sigma67

.github/workflows/coverage.yml

@@ -28,8 +28,9 @@ jobs:
         coverage run
         coverage xml
     - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
         file: coverage.xml
         flags: unittests
         fail_ci_if_error: true
+        token: ${{ secrets.CODECOV_TOKEN }}