added newline to plugins.sbt
added newline to plugins.sbt

snowflakedb/spark-snowflakedb,huaxingao/spark-redshift,methodmill/spark-redshift,sameeraxiomine/spark-redshift,davidgin/spark-redshift,huaxingao/spark-redshift,snowflakedb/spark-snowflakedb,sameeraxiomine/spark-redshift,snowflakedb/spark-snowflakedb,davidgin/spark-redshift,huaxingao/spark-redshift,sameeraxiomine/spark-redshift,snowflakedb/spark-snowflake,snowflakedb/spark-snowflake,davidgin/spark-redshift