i18n: Updated Polish translation
i18n: Updated Polish translation

RBE-Avionik/skylines,kerel-fs/skylines,kerel-fs/skylines,Turbo87/skylines,skylines-project/skylines,TobiasLohner/SkyLines,snip/skylines,Harry-R/skylines,snip/skylines,snip/skylines,Harry-R/skylines,skylines-project/skylines,kerel-fs/skylines,Harry-R/skylines,RBE-Avionik/skylines,RBE-Avionik/skylines,shadowoneau/skylines,TobiasLohner/SkyLines,shadowoneau/skylines,Harry-R/skylines,Turbo87/skylines,Turbo87/skylines,Turbo87/skylines,shadowoneau/skylines,shadowoneau/skylines,skylines-project/skylines,TobiasLohner/SkyLines,RBE-Avionik/skylines,skylines-project/skylines