Merge pull request rms-open-letter#1670 from thorstenb/patch-1

Adding my signature

Author: wohali

index.md

@@ -1817,6 +1817,7 @@ identification purposes only and does not constitute endorsement.)</small>
 1. Thomas Sirack
 1. Thomas Wouters (former GNU contributor)
 1. Thom Chiovoloni
+1. Thorsten Behrens (director, The Document Foundation)
 1. Tiago Carrondo
 1. Tiago Vinicius de Andrade Almeida
 1. Tianon Gravi