Doc: Fix wrong exception used in example. (GH-26572)

diff --git a/Doc/library/asyncio-task.rst b/Doc/library/asyncio-task.rst
index 44ec3cc..107578f 100644
--- a/Doc/library/asyncio-task.rst
+++ b/Doc/library/asyncio-task.rst
@@ -763,7 +763,7 @@
 
      try:
          result = future.result(timeout)
-     except asyncio.TimeoutError:
+     except concurrent.futures.TimeoutError:
          print('The coroutine took too long, cancelling the task...')
          future.cancel()
      except Exception as exc: