acks += Zsolt Dollenstein (GH-6490) (GH-6492)

(cherry picked from commit 2bea9476286ad8e2e87bf0415ff743b1487c5018)

Co-authored-by: Łukasz Langa <lukasz@langa.pl>
diff --git a/Misc/ACKS b/Misc/ACKS
index af06c1c..3cf1b9c 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -388,6 +388,7 @@
 Josip Djolonga
 Walter Dörwald
 Jaromir Dolecek
+Zsolt Dollenstein
 Brendan Donegan
 Ismail Donmez
 Robert Donohue