Add comment for file upload

app.py

@@ -251,6 +251,7 @@ def main():
         
     # ---------------- SECTION 1: IMAGE & PROMPT INPUTS ----------------
     st.subheader("1. Upload Source Images & Prompts")
+    st.markdown("**Note:** Your uploaded images must be of similar topology and same size to achieve the best results.")
     col_imgA, col_imgB = st.columns(2)
     with col_imgA:
         st.markdown("#### Image A")