Update DataFrame player type conversion in app.py

- Added type conversion for the 'Player' column in the stack size DataFrame to ensure consistent string representation, improving data integrity and usability in the display.

app.py

@@ -594,10 +594,11 @@ with tab2:
                             hide_index=True)
                     else:
                         st.session_state['stack_size_frame'] = create_stack_size_exposures(st.session_state['display_contest_info'], st.session_state['entry_names'])
+                        st.session_state['stack_size_frame']['Player'] = st.session_state['stack_size_frame']['Player'].astype(str)
                         st.dataframe(st.session_state['stack_size_frame'].
                             sort_values(by='Exposure Overall', ascending=False).
                             style.background_gradient(cmap='RdYlGn').
-                            format(formatter='{:.2%}', subset=st.session_state['stack_size_frame']['Exposure Overall']),
+                            format(formatter='{:.2%}', subset=st.session_state['stack_size_frame'].iloc[:, 1:].select_dtypes(include=['number']).columns),
                             hide_index=True)
             
             with tab4: