resolved bug of zip uploading

app.py

@@ -6,6 +6,7 @@ import matplotlib.pyplot as plt
 import matplotlib.animation as animation
 import streamlit.components.v1 as components
 from matplotlib import colors
+from huggingface_hub import hf_hub_url
 
 st.set_page_config(layout="wide")
 
@@ -286,13 +287,14 @@ if st.paths is not None:
     anim_src = load_src_images_as_animations(img_full_paths, pred_dates)
     components.html(anim_src.to_jshtml(), height=600)
 
-st.markdown(""" 
+zip_url = hf_hub_url(repo_id="ARTeLab/DemoCropMapping", filename="demo_data/1509.zip")
+st.markdown(f""" 
     ## Lombardia Dataset
     You can download other patches from the original dataset created and published on 
     [Kaggle](https://www.kaggle.com/datasets/ignazio/sentinel2-crop-mapping) and used in our paper.
 
     ## How to build an input file for the Demo 
-    You can download this [example zip](demo_data/1509.zip) to understand 
+    You can download this [example zip]({zip_url}) to understand 
     how to create a new sample to feed as input to the model. A sample is a time series of sentinel-2 images, 
     i.e. all images acquired by the satellite during a year.    
     A zip file must contain