bpo-32147: Improved perfomance of binascii.unhexlify(). (GH-4586)

diff --git a/Misc/ACKS b/Misc/ACKS
index dee022f..e2addfc 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -460,6 +460,7 @@
 Troy J. Farrell
 Jim Fasarakis-Hilliard
 Mark Favas
+Sergey Fedoseev
 Boris Feld
 Thomas Fenzl
 Niels Ferguson