ci: bump codecov/codecov-action to v4

Link: https://github.com/codecov/codecov-action
Signed-off-by: Ariel Otilibili <[email protected]>

Author: ariel-anieli

.github/workflows/ci.yml

@@ -81,7 +81,7 @@ jobs:
       - run: python -m pip install --upgrade pip setuptools wheel
       - run: python -m pip install --upgrade tox
       - run: python -m tox -e coverage
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v4
 
   deploy:
     needs: [lint, test]