Strip whitespace from player columns in app.py

- Updated the data type conversion for player columns to include a string strip operation, ensuring that any leading or trailing whitespace is removed. This change enhances data integrity and consistency during processing.

app.py

@@ -153,7 +153,7 @@ with tab2:
         st.session_state['player_columns'] = [col for col in st.session_state['Contest'].columns if col not in excluded_cols]
         print(st.session_state['player_columns'])
         for col in st.session_state['player_columns']:
-            st.session_state['Contest'][col] = st.session_state['Contest'][col].astype(str)
+            st.session_state['Contest'][col] = st.session_state['Contest'][col].astype(str).str.strip()
     
         # Create mapping dictionaries
         st.session_state['map_dict'] = {