Fix dangling log_output in Service (SeleniumHQ#12871)

The isinstance check was faulty and checked wrong type

Fixes SeleniumHQ#12870

py/selenium/webdriver/common/service.py

@@ -21,10 +21,10 @@
 import typing
 from abc import ABC
 from abc import abstractmethod
+from io import IOBase
 from platform import system
 from subprocess import PIPE
 from time import sleep
-from typing import TextIO
 from urllib import request
 from urllib.error import URLError
 
@@ -136,7 +136,7 @@ def stop(self) -> None:
         """Stops the service."""
 
         if self.log_output != PIPE:
-            if isinstance(self.log_output, TextIO):
+            if isinstance(self.log_output, IOBase):
                 self.log_output.close()
             elif isinstance(self.log_output, int):
                 os.close(self.log_output)