Corrected minor issue in example code
Corrected minor issue in example code

On line 286, `joinWithCassandra` should be `joinWithCassandraTable`.
christobill/spark-cassandra-connector,datastax/spark-cassandra-connector,datastax/spark-cassandra-connector,ponkin/spark-cassandra-connector,shashwat7/spark-cassandra-connector,ponkin/spark-cassandra-connector,christobill/spark-cassandra-connector,shashwat7/spark-cassandra-connector