Merge pull request rms-open-letter#1521 from kyrios123/patch-1

Sign rms-open-letter

Author: neilmcgovern

index.md

@@ -1375,6 +1375,7 @@ identification purposes only and does not constitute endorsement.)</small>
 1. Pierre Dupont
 1. Pierre Marijon
 1. Pierre Ozoux (@pierreozoux)
+1. Pierre-Yves (Solus)
 1. Pierros Papadeas (Board member, Libre Space Foundation)
 1. Pieter De Praetere
 1. Pietro Gagliardi (`andlabs`; currently at Google)