Making a few update changes on app_3_eda_basketball/basketball_app.py

[Luismbpr]

Making a few changes on: app_3_eda_basketball/basketball_app.py

Updating by making slight modifications on heatmap to:

1. Drop non-numerical columns (string columns Player, Pos, Tm)
2. Using st.pyplot(f) to show heatmap without any warnings.