translations: Fix translation of "name" to "Name"

"Nachname" ist not correct in all contexts. For example, "name" in the
contact list is the full name. Fix to "Name".

This is a quickfix which should be reviewed and possibly converted into
a gettext context.

locale/de/LC_MESSAGES/django.po

@@ -445,7 +445,7 @@ msgstr "Sonderfunktion"
 #: mpicms/templates/wagtailusers/users/list.html:8
 #: mpicms/templates/wagtailusers/users/list.html:12
 msgid "Name"
-msgstr "Nachname"
+msgstr "Name"
 
 #: mpicms/templates/personal/list.html:93
 msgid "Email"