Updated notebook samples

Author: uc-msft

samples/features/sql-big-data-cluster/spark/data-loading/spark-sql.ipynb

@@ -19,7 +19,7 @@
     "cells": [
         {
             "cell_type": "markdown",
-            "source": "# Spark sample showing read/write methods\nIn this sample notebook, we will read CSV file from HDFS, write it as parquet file and save a Hive table definition.",
+            "source": "# Spark sample showing read/write methods\nIn this sample notebook, we will read CSV file(s) from HDFS, write it as parquet & orc file(s) and save a Hive table definition.",
             "metadata": {}
         },
         {