Fix bug #183 and bug #185

[nicoleeeluo]

Description

1. Commit to fix bug Update single_gpu_tutorial.ipynb to use a recent snapshot #185.
2. Commit to fix bug single_gpu_tutorial.ipynb fails to run on GPU #183.
3. Comment out optional result verification cells to avoid similar issues
4. Update notebook for latest NeMo Curator version

Usage

Add snippet demonstrating usage

## Checklist
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- [ ] I am familiar with the [Contributing Guide](https://github.com/NVIDIA/NeMo-Curator/blob/main/CONTRIBUTING.md).
- [ ] New or Existing tests cover these changes.
- [ ] The documentation is up to date with these changes.