[3.14] Fix typo in asyncio documentation (GH-148747) (#156493)

Co-authored-by: ByteFlow <fakeshadow1337@gmail.com>

Author: willy-b

Doc/library/asyncio-dev.rst

@@ -304,7 +304,7 @@ generator can occur in an unexpected order::
       try:
           yield 2
       finally:
-          await asyncio.sleep(0.1) # immitate some async work
+          await asyncio.sleep(0.1) # imitate some async work
           work_done = True