Issue #23581: Add matmul support to MagicMock.

Patch by Håkan Lövdahl.
diff --git a/NEWS b/NEWS
index 89fdcc0..6278fba 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,5 @@
+- Issue #23581: Add matmul support to MagicMock. Patch by Håkan Lövdahl.
+
 - Issue #23326: Removed __ne__ implementations.  Since fixing default __ne__
   implementation in issue #21408 they are redundant. **** NOT BACKPORTED ****