Fix potential resource leaks in concurrent.futures.ProcessPoolExecutor
by joining all queues and processes when shutdown() is called.
diff --git a/Misc/NEWS b/Misc/NEWS
index e75de01..8d7fb16 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -228,6 +228,9 @@
 Library
 -------
 
+- Fix potential resource leaks in concurrent.futures.ProcessPoolExecutor
+  by joining all queues and processes when shutdown() is called.
+
 - Issue #11603: Fix a crash when __str__ is rebound as __repr__.  Patch by
   Andreas Stührk.