MT#19881 Fix typo in german translation

Should be "Sprachnachrichten" instead of "Sprachnachriten".

Change-Id: Ib8086854bd27be01708d8f468f5de726f4250fac
Thanks: Matthias Hohl for reporting this bug on the spce-user mailing list

lib/NGCP/Panel/I18N/de.po

@@ -11003,7 +11003,7 @@ msgstr "Sprachnachrichten"
 
 #: share/templates/subscriber/preferences.tt
 msgid "Voicemail and Voicebox"
-msgstr "Sprachnachriten und Sprachbox"
+msgstr "Sprachnachrichten und Sprachbox"
 
 #: share/templates/subscriber/master.tt
 #: share/templates/subscriber/voicemail.tt