Issue #14775: Fix a potential quadratic dict build-up due to the garbage collector repeatedly trying to untrack dicts.
Additional comments by Tim Silk.
diff --git a/Misc/ACKS b/Misc/ACKS
index 9908bb1..eb53d75 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -791,6 +791,7 @@
 Itamar Shtull-Trauring
 Eric Siegerman
 Paul Sijben
+Tim Silk
 Kirill Simonov
 Nathan Paul Simons
 Janne Sinkkonen