updated Polish translation
updated Polish translation

Signed-off-by: Marcin Mikołajczak <b1c1d8736f20db3fb6c1c66bb1455ed43909f0d8@m4sk.in>

lxde/lxqt-notificationd,lxde/lxqt-notificationd,stefonarch/lxqt-notificationd,stefonarch/lxqt-notificationd