Update app.py

Correct content of chat history

app.py

@@ -330,7 +330,7 @@ def func_upload_file(files, chat_history):
     print(file_path)
     # UpdateDb()
     print(chat_history)
-    test_msg = ["Test upload", "Ongoing"]
+    test_msg = ["", "Test Upload Ongoing...."]
     chat_history.append(test_msg)
     return chat_history