bpo-37627: Add acknowledgment (GH-14883)

(cherry picked from commit 4214f1ec3b3c73badd639229eff81eb5e57b82ec)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
diff --git a/Misc/ACKS b/Misc/ACKS
index 5c7ec99..a4973a8 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -1533,6 +1533,7 @@
 Yann Sionneau
 George Sipe
 J. Sipprell
+Ngalim Siregar
 Kragen Sitaker
 Kaartic Sivaraam
 Ville Skyttä