Update app.py

app.py

@@ -440,7 +440,7 @@ def respond(message, history, model, temperature, num_calls, use_web_search, sel
             yield "Unable to generate a response. Please try a different query."
     
     else:
-         try:
+        try:
             embed = get_embeddings()
             pdf_database = None
             office_database = None