Update app.py

app.py

@@ -6,6 +6,7 @@ import argostranslate.translate
 
 # Load Argos Translate Urdu to English model (first time only)
 def load_argos_translate_model():
+    argostranslate.package.update_package_index()  # 🔧 Add this line
     available_packages = argostranslate.package.get_available_packages()
     for pkg in available_packages:
         if pkg.from_code == "ur" and pkg.to_code == "en":