Update note in proportion graph

ui.py

@@ -407,9 +407,8 @@ def render_multifile_summary(plotly_config=None):
             fig6.update_layout(yaxis_title="Proportion of File Duration")
             st.plotly_chart(fig6, use_container_width=True, config=cfg)
             st.caption(
-                "* Note: Overlaps between speakers of the same role are only counted once. "
-                "Bars may not sum to 1 — silence and cross-role overlaps are not shown here. "
-                "See the voice categories chart below for the full breakdown."
+                "*Note: Proportion may not sum to 1 as overlaps between speakers "
+                "are only counted once."
             )
 
             sort_options = {