Issue #15444: Use proper spelling for non-ASCII contributor names.
Patch by Serhiy Storchaka.
diff --git a/Misc/ACKS b/Misc/ACKS
index 36dc7fe..c3c59de 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -855,7 +855,7 @@
 Steven Scott
 Barry Scott
 Nick Seidenman
-Žiga Seilnach
+Žiga Seilnacht
 Yury Selivanov
 Fred Sells
 Jiwon Seo