Move editorship to @npm (#546)

Co-authored-by: Sam Goto <[email protected]>

Author: samuelgoto

spec/index.bs

@@ -6,7 +6,8 @@ Status: w3c/CG-DRAFT
 Group: fedidcg
 ED: https://fedidcg.github.io/FedCM/
 Repository: fedidcg/FedCM
-Editor: Sam Goto, Google Inc. https://google.com, [email protected]
+Editor: Nicolás Peña Moreno, Google Inc. https://google.com, [email protected]
+Former Editor: Sam Goto, Google Inc. https://google.com, [email protected]
 
 Markup Shorthands: markdown yes, biblio yes
 Default Biblio Display: inline