correct arabic chars in Persian files

The YEH in Persian is quite different than YEH in Arabic, in this commit, I've corrected all incorrect Arabic characters that make SEO problems and etc to correct Persian chars. see below:
https://stackoverflow.com/questions/5616063/characters-%D9%8A-and-%DB%8C-and-the-difference-in-persian-mysql
and
https://en.wiktionary.org/wiki/ی
https://en.wiktionary.org/wiki/ې