⬆️ Update codecov/codecov-action action to v5.4.0

Author: renovate[bot]

.github/workflows/tests.yaml

@@ -74,7 +74,7 @@ jobs:
           poetry run coverage combine coverage*/.coverage*
           poetry run coverage xml -i
       - name: 🚀 Upload coverage report
-        uses: codecov/codecov-action@v5.3.1
+        uses: codecov/codecov-action@v5.4.0
         with:
           fail_ci_if_error: true
           token: ${{ secrets.CODECOV_TOKEN }}