Add Neil Watson (rms-open-letter#21)

Co-authored-by: Elana Hashman <[email protected]>

Author: neilhwatson

index.md

@@ -57,4 +57,5 @@ Signed,
 - Antoine Beaupré AKA anarcat (Debian Developer, former FSF member)
 - Emmanuele Bassi (GNOME Foundation)
 - Daniel Soskel
-- Tony Colston
+- Tony Colston
+- Neil Watson (Former CFEngine Community Advisory Board Member)