Update Ruby port in README.md (#1652)

README.md

@@ -170,6 +170,6 @@ maintenance processes.
 *   C#: https://github.com/aidanbebbington/libphonenumber-csharp
 *   PHP: https://github.com/giggsey/libphonenumber-for-php
 *   Python: https://github.com/daviddrysdale/python-phonenumbers
-*   Ruby: https://github.com/sstephenson/global_phone
-*   javascript (stripped-down version): https://github.com/halt-hammerzeit/libphonenumber-js
-*   objective-c: https://github.com/iziz/libPhoneNumber-iOS
+*   Ruby: https://github.com/mobi/telephone_number
+*   Javascript (stripped-down version): https://github.com/halt-hammerzeit/libphonenumber-js
+*   Objective-c: https://github.com/iziz/libPhoneNumber-iOS