Update dmoz.org to dmoztools.net on community page (en) (#1966)

* Update dmoz.org to dmoztools.net

dmoz.org is no longer operating, but the information is still available
on dmoztools.net. I think it's worth considering changing these
resources out for more modern ones.

* Add https to links and fix broken dmztools.net link

Author: jacobherrington

en/community/index.md

@@ -50,5 +50,5 @@ General Ruby Information
 
 
 [3]: http://rubycentral.org/
-[4]: http://dmoz.org/Computers/Programming/Languages/Ruby/
-[5]: http://dmoz.org/Computers/Programming/Languages/Ruby/Software/Rails/
+[4]: https://dmoztools.net/Computers/Programming/Languages/Ruby/
+[5]: https://dmoztools.net/Computers/Programming/Languages/Ruby/Software/Frameworks/Rails/