Merge pull request rms-open-letter#1374 from samth/patch-3

Update index.md

Author: neilmcgovern

index.md

@@ -1329,6 +1329,7 @@ identification purposes only and does not constitute endorsement.)</small>
 1. Sam Pikesley
 1. Sam Pritchard
 1. Samuel Scheiderich
+1. Sam Tobin-Hochstadt
 1. Sam van der Kris
 1. Sander van der Waal (Waag)
 1. Sandro Jäckel (NixOS contributor)