LANGS.md: persian added to list of languages
LANGS.md: persian added to list of languages

admpub/build-web-application-with-golang,astaxie/build-web-application-with-golang,WangKaimin/build-web-application-with-golang,astaxie/build-web-application-with-golang,admpub/build-web-application-with-golang,astaxie/build-web-application-with-golang,admpub/build-web-application-with-golang,admpub/build-web-application-with-golang,WangKaimin/build-web-application-with-golang