Update index.md (rms-open-letter#36)

Sydney Schreckengost · web-flow · commit bb20693d0fca · 2021-03-23T12:02:08.000-07:00
diff --git a/index.md b/index.md
@@ -71,5 +71,6 @@ Signed,
 - Peter Van Eynde
 - Jerome Charaoui (Debian Developer, former FSF member)
 - Daniel Stone (freedesktop.org, Wayland)
+- Sydney Schreckengost
 - Jonathan McDowell
 - Markus Unterwaditzer
