added uyghur as a language.
added uyghur as a language.

related to https://unisubs.sifterapp.com/projects/12298/issues/490171/comments
ujdhesa/unisubs,ujdhesa/unisubs,ujdhesa/unisubs,ofer43211/unisubs,ujdhesa/unisubs,ReachingOut/unisubs,eloquence/unisubs,norayr/unisubs,norayr/unisubs,norayr/unisubs,ReachingOut/unisubs,wevoice/wesub,ReachingOut/unisubs,eloquence/unisubs,pculture/unisubs,pculture/unisubs,pculture/unisubs,ofer43211/unisubs,ReachingOut/unisubs,ofer43211/unisubs,ofer43211/unisubs,eloquence/unisubs,wevoice/wesub,wevoice/wesub,pculture/unisubs,eloquence/unisubs,norayr/unisubs,wevoice/wesub