Update subheader in app.py for clarity in name matching functions

- Changed the subheader from "Name Matching Analysis" to "Name Matching functions" to better reflect the functionality being presented in the application.

app.py

@@ -70,7 +70,7 @@ with tab1:
 
     if Contest_file and projections_file:
         if st.session_state['Contest'] is not None and projections is not None:
-            st.subheader("Name Matching Analysis")
+            st.subheader("Name Matching functions")
             # Initialize projections_df in session state if it doesn't exist
             if 'projections_df' not in st.session_state:
                 st.session_state['projections_df'] = projections.copy()