Update app.py

Change to prediction API endpoint.

app.py

@@ -15,7 +15,7 @@ import requests
 import json
  
 # API for inferences
-DL4EO_API_URL = "https://dl4eo--predict.modal.run"
+DL4EO_API_URL = "https://dl4eo--aircraft-predict.modal.run"
 
 # Auth Token to access API
 DL4EO_API_KEY = os.environ['DL4EO_API_KEY']