Add missing NEWS and ACK entries for r64791
diff --git a/Misc/ACKS b/Misc/ACKS
index a9713b0..e79f20a 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -146,6 +146,7 @@
 Matthew Dixon Cowles
 Christopher A. Craig
 Laura Creighton
+Simon Cross
 Drew Csillag
 John Cugini
 Tom Culliton