[gnome-session] Update Catalan translation

[Jordi Mas <jmas src gnome org>]

commit 2a827d99dcdb3a429c798f7ce96e9141ea7a1b23
Author: Jordi Mas <jmas softcatala org>
Date:   Fri May 7 18:55:01 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 025f3b62..59709287 100644
--- a/po/ca.po
+++ b/po/ca.po
@@ -330,7 +330,7 @@ msgstr "Surt"
 
 #: tools/gnome-session-quit.c:51
 msgid "Power off"
-msgstr "Atura"
+msgstr "Apaga"
 
 #: tools/gnome-session-quit.c:52
 msgid "Reboot"