Update app.py

app.py

@@ -130,7 +130,7 @@ This is a object detection model for [crosswalks].
 option = st.radio("", ["Upload Image", "Image URL"])
 
 if option == "Upload Image":
-    uploaded_file = st.file_uploader("Please upload an image.")
+    uploaded_file = st.file_uploader("Please upload an crosswalks image.")
 
     if uploaded_file is not None:
         img = PILImage.create(uploaded_file)