[gnome-system-monitor] Update Catalan translation

[Jordi Mas <jmas src gnome org>]

commit 7cb2c66b5328e5f67f7497dfa8bd32619fb53bf4
Author: Jordi Mas <jmas softcatala org>
Date:   Tue Apr 17 07:16:43 2018 +0200

    Update Catalan translation

 po/ca.po |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/po/ca.po b/po/ca.po
index b53a762..5e54979 100644
--- a/po/ca.po
+++ b/po/ca.po
@@ -466,7 +466,7 @@ msgstr "%b %d %l:%M %p"
 
 #: ../src/legacy/e_date.c:194
 msgid "%b %d %Y"
-msgstr "%d de %b de %Y"
+msgstr "%d %b de %Y"
 
 #: ../src/legacy/gsm_color_button.c:141
 msgid "Fraction"