Mention FAQ in README
Mention FAQ in README

ah-/rdkafka-dotnet,MrGlenThomas/confluent-kafka-dotnet,treziac/confluent-kafka-dotnet,bjornicus/confluent-kafka-dotnet,bjornicus/confluent-kafka-dotnet,MrGlenThomas/confluent-kafka-dotnet,treziac/confluent-kafka-dotnet,MaximGurschi/rdkafka-dotnet