Update CHANGES.txt
Update CHANGES.txt

maasg/spark-cassandra-connector,shashwat7/spark-cassandra-connector,ponkin/spark-cassandra-connector,christobill/spark-cassandra-connector,maasg/spark-cassandra-connector,datastax/spark-cassandra-connector,ponkin/spark-cassandra-connector,christobill/spark-cassandra-connector,shashwat7/spark-cassandra-connector,datastax/spark-cassandra-connector