Bump codecov/codecov-action from 5.5.3 to 6.0.0 (#297)

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -347,4 +347,4 @@ jobs:
           coverage report
           coverage xml
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v5.5.3
+        uses: codecov/codecov-action@v6.0.0