Fix podnapisi provider
Fix podnapisi provider

The download url is not longer a link on the page, but it's the
subtitle.page_link appended with '/download'.

Diaoul/subliminal,neo1691/subliminal,ofir123/subliminal,hpsbranco/subliminal,pums974/subliminal,ratoaq2/subliminal,SickRage/subliminal,t4lwh/subliminal,bogdal/subliminal,Elettronik/subliminal,juanmhidalgo/subliminal,goll/subliminal,fernandog/subliminal,oxan/subliminal,kbkailashbagaria/subliminal,getzze/subliminal,h3llrais3r/subliminal