bpo-43399: Fix ElementTree.extend not working on iterators (GH-24751)

diff --git a/Misc/ACKS b/Misc/ACKS
index 5d3f75a..42f0efd 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -1381,6 +1381,7 @@
 Davin Potts
 Guillaume Pratte
 Florian Preinstorfer
+Alex Prengère
 Amrit Prem
 Paul Prescod
 Donovan Preston