bpo-30245: Fix possible overflow when organize struct.pack_into error message (#1682)

diff --git a/Misc/ACKS b/Misc/ACKS
index bee9eb0..6fe57d5 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -921,6 +921,7 @@
 Everett Lipman
 Mirko Liss
 Alexander Liu
+Yuan Liu
 Nick Lockwood
 Stephanie Lockwood
 Martin von Löwis