l10n:add translation to card placeholder
l10n:add translation to card placeholder

Signed-off-by: Michiel Janssens <f19b4a31e76099b849c1c87b812211c019085cbd@nexigon.net>

juliushaertl/deck,nextcloud/deck,nextcloud/deck,nextcloud/deck,juliushaertl/deck,juliushaertl/deck