Bump Codecov action to version 5.

Author: acolomb

.github/workflows/pythonpackage.yml

@@ -42,7 +42,7 @@ jobs:
     - name: Test with pytest
       run: pytest -v --cov=canopen --cov-report=xml --cov-branch
     - name: Upload coverage reports to Codecov
-      uses: codecov/codecov-action@v4
+      uses: codecov/codecov-action@v5
       with:
         token: ${{ secrets.CODECOV_TOKEN }}