Updating rmg webdev uri
Updating rmg webdev uri

Summary: The rmg webdev uri was incorrect

Reviewers: arik, benchan

Reviewed By: benchan

Subscribers: ben

Differential Revision: https://phabricator.bitgo.com/D5215

BitGo/BitGoJS,BitGo/BitGoJS,BitGo/BitGoJS,BitGo/BitGoJS