authors: update list and add a missing line feed

Change-Id: Icfd5e217974f6aafe4776d59033d45e9454c74d2
diff --git a/src/dialogs.c b/src/dialogs.c
index 8e8d0bd..d4e4dd6 100644
--- a/src/dialogs.c
+++ b/src/dialogs.c
@@ -100,15 +100,18 @@
         "Frédéric Guimont",
         "Guillaume Roguez",
         "Julien Grossholtz",
+        "Kateryna Kostiuk",
         "Loïc Siret",
         "Nicolas Jäger",
-        "Nicolas Reynaud"
+        "Nicolas Reynaud",
         "Olivier Gregoire",
         "Olivier Soldano",
         "Patrick Keroulas",
         "Philippe Gorley",
         "Romain Bertozzi",
+        "Sébastien Blin",
         "Seva Ivanov",
+        "Silbino Gonçalves Matado",
         "Simon Désaulniers",
         "Stepan Salenikovich",
         "Simon Zeni",