Fixed typo in itertools documentation (GH-23816)

diff --git a/Misc/ACKS b/Misc/ACKS
index 134f4ea..381aed1 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -1624,6 +1624,7 @@
 Michael Sloan
 Nick Sloan
 Václav Šmilauer
+Casper W. Smet
 Allen W. Smith
 Christopher Smith
 Eric V. Smith