upgrade codecov action

Author: bckohan

.github/workflows/test.yml

@@ -81,7 +81,7 @@ jobs:
         poetry run python -m readme_renderer ./README.rst -o /tmp/README.html
 
     - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v1
+      uses: codecov/codecov-action@v3
       with:
         file: ./coverage.xml