Update app.py

app.py

@@ -580,7 +580,7 @@ with gr.Blocks() as demo:
     - The established format for the coordinates of each access point (AP) must be followed.
     - A maximum of 2 APs per channel is allowed for the interference case.
     - A maximum of 5 APs is allowed for the non-interference case.
-    - The uploaded plan must meet the dimensions [256,256,3], with free spaces as white pixels and walls as black pixels.
+    - The uploaded plan must meet the dimensions [256,256], with free spaces as white pixels and walls as black pixels.
     """
     )