InterBrokerRouter needed to update. found bug in line 207

[KamranShahid]

I am working on .net 4.7 and netmq latest version.
Getting error at line var peerIdx = rnd.Next(peers.Count - 2) + 2;
it should be
var peerIdx = rnd.Next(0, peers.Count);

Anybody look into it by running it?