fix correlation type error

Signed-off-by: Yotam-Perlitz <y.perlitz@ibm.com>

app.py

@@ -714,7 +714,7 @@ plotted_scenario = st.selectbox(
 col1, col2, col3 = st.columns(3)
 cur_data = data.query(f"Benchmark=='{plotted_scenario}'")
 col1.metric("Relative agreement", cur_data["Relative agreement (Z Score)"])
-col2.metric("Kendall Tau Corr.", cur_data["Kendall Tau Corr."])
+col2.metric(corr_name, cur_data[corr_name])
 col3.metric("p-value of Corr.", cur_data["p-value of Corr."])
 
 cur_df = allbench.df.query(f'scenario=="aggregate" or scenario=="{plotted_scenario}"')