Refine user instructions in app.py for clarity on image upload and output scoring

app.py

@@ -148,9 +148,9 @@ with gr.Blocks(title="LightGlue Matching Demo") as demo:
     )
     gr.Markdown("""
         ## How to use:
-        1. Upload two images using the file uploaders above
+        1. Upload two images using the file uploaders below
         2. Click the 'Match Images' button
-        3. View the matched output image below
+        3. View the matched output image below. Higher scores are green, lower scores are red.
         
         The app will create a side-by-side matching of your images using LightGlue.
         You can also select an example image pair from the dataset.