update marker labels files

app.py

@@ -393,7 +393,7 @@ with gr.Blocks() as demo:
     '</ul></div>')
     gr.Markdown('<div class="h-2 bold">Case 2: &nbsp; Upload multiple files</div>')
     gr.Markdown('<div class="h-2"><ul><li>upload a TIFF file containing Regions of Interest (ROIs) stored as multiplexed images. <a href="https://qbrc.swmed.edu/labs/xiaoxie/download/multiplex/example_image.tiff" download target="_blank">Example ROI</a></li>'
-    '<li>upload a Marker File listing the channels to identify the antibodies. <a href="https://github.com/QBRC/multiTAP/blob/main/example_data/markers_labels.txt" download target="_blank">Example Marker File</a></li>'
+    '<li>upload a Marker File listing the channels to identify the antibodies. <a href="https://github.com/QBRC/multiTAP/blob/main/notebooks/supplemental/markers_labels_BrCa.txt" download target="_blank">Example Marker File</a></li>'
     '</ul></div><hr>')
     
     gr.Markdown('<div class="h-2">Select Input Case:</div>')