refactor: update notebook imports after prompt-ops package refactor

[heyjustinai]

What does this PR do?

Updates Python import paths in prompt-ops_101.ipynb notebook from llama_prompt_ops to prompt_ops to reflect the recent package refactor.

Fixes # (issue)
#995

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• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
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Thanks for contributing 🎉!

[IgorKasianenko]

LG, thanks for PR