Added hebrew to main readme file.

README.md

@@ -85,6 +85,7 @@ Our client library is modular. Each sub-library is a standalone implementation f
 - [French / Français](/i18n/README.fr.md)
 - [German / Deutsch](/i18n/README.de.md)
 - [Greek / Ελληνικά](/i18n/README.gr.md)
+- [Hebrew / עברית](/i18n/README.he.md)
 - [Hindi / हिंदी](/i18n/README.hi.md)
 - [Nepali / नेपाली](/i18n/README.ne.md)
 - [Indonesian / Bahasa Indonesia](/i18n/README.id.md)