[gnome-system-monitor] Update Catalan translation

[Jordi Mas <jmas src gnome org>]

commit 7cf083456a432baa336ef9337aff0bb09deab136
Author: Jordi Mas <jmas softcatala org>
Date:   Tue Apr 13 22:30:47 2021 +0200

    Update Catalan translation

 po/ca.po | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/po/ca.po b/po/ca.po
index f25ba093..00a41a5c 100644
--- a/po/ca.po
+++ b/po/ca.po
@@ -404,7 +404,7 @@ msgstr "Comportament"
 
 #: data/preferences.ui:24 data/preferences.ui:303
 msgid "_Update Interval in Seconds"
-msgstr "Interval d'_actualitzacions en segons:"
+msgstr "Interval d'_actualitzacions en segons"
 
 #: data/preferences.ui:42
 msgid "Enable _Smooth Refresh"