Fix unresolved Git conflict in Sample_Notebook.ipynb

[VinayTodkar]

Fixes #58.

The NLPRenaissanceChallenge/Sample_Notebook.ipynb file contained unresolved Git conflict markers:

• <<<<<<< Updated upstream
• =======
• >>>>>>> Stashed changes

These markers caused the notebook to become invalid JSON and prevented it from being opened correctly as a Jupyter Notebook.

I restored the notebook to the last known valid version and removed the unresolved conflict.

Validation

The notebook was verified using:

• JSON parsing with Python's json module
• Jupyter Notebook validation using nbformat
• Verified that no actual Git conflict markers remain

Validation result:

• Valid JSON
• Valid Jupyter Notebook
• 78 cells