fix: python rest example (#13554)

docs-examples/python/connect_rest_examples.py

 # ANCHOR: connect
 from taosrest import connect, TaosRestConnection, TaosRestCursor
 
-conn: TaosRestConnection = connect(host="localhost",
+conn: TaosRestConnection = connect(url="http://localhost:6041",
                                    user="root",
                                    password="taosdata",
-                                   port=6041,
                                    timeout=30)
 
 # ANCHOR_END: connect

docs-examples/python/rest_client_example.py

 from taosrest import RestClient
 
-client = RestClient("localhost", 6041, "root", "taosdata")
+client = RestClient("http://localhost:6041", user="root", password="taosdata")
 res: dict = client.sql("SELECT ts, current FROM power.meters LIMIT 1")
 print(res)