Fix the REST API URL in README
Fix the REST API URL in README

sbender9/signalk-server-node,sbender9/signalk-server-node,webmasterkai/signalk-server-node,webmasterkai/signalk-server-node,SignalK/signalk-server-node,webmasterkai/signalk-server-node,sbender9/signalk-server-node,SignalK/signalk-server-node,SignalK/signalk-server-node,SignalK/signalk-server-node