Update contributor list to include people who were missing.

Author: Gordon

affinity/cpp-20/d0796r3.md

@@ -6,7 +6,7 @@
 
 **Authors: Gordon Brown, Ruyman Reyes, Michael Wong, H. Carter Edwards, Thomas Rodgers, Mark Hoemmen**
 
-**Contributors: Patrice Roy, Carl Cook, Jeff Hammond, Hartmut Kaiser, Christian Trott, Paul Blinzer, Alex Voicu**
+**Contributors: Patrice Roy, Carl Cook, Jeff Hammond, Hartmut Kaiser, Christian Trott, Paul Blinzer, Alex Voicu, Nat Goodspeed, Tony Tye, Paul Blinzer**
 
 **Emails: gordon@codeplay.com, ruyman@codeplay.com, michael@codeplay.com, hedwards@nvidia.com, rodgert@twrodgers.com, mhoemme@sandia.gov**