Merge pull request rms-open-letter#1288 from mariospr/main

Add Mario Sánchez Prada to the list of signatures

Author: neilmcgovern

index.md

@@ -923,6 +923,7 @@ identification purposes only and does not constitute endorsement.)</small>
 1. Mariatta Wijaya (Python Software Foundation Fellow members, OSI member, PyLadies)
 1. Marina "deneb_alpha" Latini (former The Document Foundation chairperson, former openSUSE board member, LibreOffice and openSUSE contributor)
 1. Mario Torre
+1. Mario Sánchez Prada (Igalia, GNOME)
 1. Marius Gedminas
 1. Marius Gripsgard (UBports Foundation founder, Lead Developer and Board of Directors, Ubuntu Member)
 1. Marius Quabeck (NerdZoom Media)