bpo-37627: Add acknowledgment (#14883)

diff --git a/Misc/ACKS b/Misc/ACKS
index 3e6a0ac..b062855 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -1537,6 +1537,7 @@
 Yann Sionneau
 George Sipe
 J. Sipprell
+Ngalim Siregar
 Kragen Sitaker
 Kaartic Sivaraam
 Ville Skyttä