bpo-12414: Update code_sizeof() to take in account co_extra memory. (#1168)

diff --git a/Misc/ACKS b/Misc/ACKS
index 8c44397..d4f20c5 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -1063,6 +1063,7 @@
 Matti Mäki
 Jörg Müller
 Kaushik N
+Dong-hee Na
 Dale Nagata
 John Nagle
 Takahiro Nakayama