Closes #21149: Improved thread-safety in logging cleanup during interpreter shutdown.

diff --cc Misc/NEWS
index 24bd7b6446711688e72ba50c17bd08da04aacc8e,4f27a991e94d0260fc3dd84a0661c87ccfd7f2e4..5466267a8ef0a2fd0999730fa681c7db1ce222a7
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -29,6 -27,12 +29,9 @@@ Core and Builtin
  Library
  -------
  
 -- Issue #20145: `assertRaisesRegex` and `assertWarnsRegex` now raise a
 -  TypeError if the second argument is not a string or compiled regex.
 -
+ - Issue #21149: Improved thread-safety in logging cleanup during interpreter
+   shutdown. Thanks to Devin Jeanpierre for the patch.
+ 
  - Issue #21058: Fix a leak of file descriptor in
    :func:`tempfile.NamedTemporaryFile`, close the file descriptor if
    :func:`io.open` fails