Fix: resolve turicreate dependency for Windows 10 (Issue #1)

[mariam851]

Hi @luisguiserrano,

I've updated the notebook for Chapter 8 to resolve the turicreate dependency issue on Windows 10, as mentioned in Issue #1.

Changes made:

• Replaced the dependency with pandas and scikit-learn logic which is cross-platform.
• Fixed a compatibility issue with np.compat.long for newer Numpy versions.
• Verified that the notebook runs perfectly from start to finish using pytest --nbmake.
• Confirmed the model still predicts correctly (e.g., spam probability for 'lottery' is ~0.9).

Best regards!