bpo-30441: Fix bug when modifying os.environ while iterating over it (#2409)

diff --git a/Misc/ACKS b/Misc/ACKS
index 910f819..3455c1b 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -1088,6 +1088,7 @@
 Tony Nelson
 Trent Nelson
 Andrew Nester
+Osvaldo Santana Neto
 Chad Netzer
 Max Neunhöffer
 Anthon van der Neut