Update selection mode in Handbuilder tab of Streamlit app from "multiple" to "multi-row" to enhance clarity in player selection functionality.

src/streamlit_app.py

@@ -619,7 +619,7 @@ if selected_tab == 'Handbuilder':
         event = st.dataframe(
             st.session_state['player_select_df'].style.background_gradient(axis=0).background_gradient(cmap='RdYlGn').background_gradient(cmap='RdYlGn_r', subset=['Salary', 'Own']).format(precision=2),
             on_select="rerun",
-            selection_mode="multiple",  # Changed to multiple selection
+            selection_mode="multi-row",  # Changed to multiple selection
             key="player_select_dataframe",
             height=500,
             hide_index=True