[gnome-contacts] Fix Spanish translation header

[Piotr Drąg <piotrdrag src gnome org>]

commit 3e98fb4c807ec9540ae4a557baff601ee95ed12e
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Fri Feb 23 23:29:00 2018 +0100

    Fix Spanish translation header

 po/es.po | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/po/es.po b/po/es.po
index a1ef91a..42d2495 100644
--- a/po/es.po
+++ b/po/es.po
@@ -4,8 +4,8 @@
 # FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
 # 
 # 
-# Jorge González <jorgegonz svn gnome org>, 2011., 2011.
-# Daniel Mustieles <daniel mustieles gmail com>, 2011., 2012, 2013, 2014, 2015, 2016, 2017, 2018.
+# Jorge González <jorgegonz svn gnome org>, 2011.
+# Daniel Mustieles <daniel mustieles gmail com>, 2011-2018.
 #
 msgid ""
 msgstr ""