authors: update list

Change-Id: I79220c6593a39a07e9a11a20811bfe1ce7801da1
Reviewed-by: Guillaume Roguez <guillaume.roguez@savoirfairelinux.com>
diff --git a/Credits.rtf b/Credits.rtf
index 991a9e7..21b466e 100644
--- a/Credits.rtf
+++ b/Credits.rtf
@@ -28,6 +28,7 @@
 Fr\'e9d\'e9ric Guimont\
 Guillaume Roguez\
 Julien Grossholtz\
+Kateryna Kostiuk\
 Lo\'efc Siret\
 Marianne Forget\
 Nicolas J\'e4ger\
@@ -37,7 +38,9 @@
 Patrick Keroulas\
 Philippe Gorley\
 Romain Bertozzi\
+S\'e9bastien Blin\
 Seva Ivanov\
+Silbino Gon\'e7alves Matado\
 Simon D\'e9saulniers\
 Stepan Salenikovich\
 Simon Zeni\