[MINOR][DOCS] Fix Spark hive example.

## What changes were proposed in this pull request?

Documentation has an error, https://spark.apache.org/docs/latest/sql-data-sources-hive-tables.html#hive-tables.

The example:
```scala
scala> val dataDir = "/tmp/parquet_data"
dataDir: String = /tmp/parquet_data

scala> spark.range(10).write.parquet(dataDir)

scala> sql(s"CREATE EXTERNAL TABLE hive_ints(key int) STORED AS PARQUET LOCATION '$dataDir'")
res6: org.apache.spark.sql.DataFrame = []

scala> sql("SELECT * FROM hive_ints").show()

+----+
| key|
+----+
|null|
|null|
|null|
|null|
|null|
|null|
|null|
|null|
|null|
|null|
+----+
```

Range does not emit `key`, but `id` instead.

Closes #24657 from ScrapCodes/fix_hive_example.

Lead-authored-by: Prashant Sharma <prashant@apache.org>
Co-authored-by: Prashant Sharma <prashsh1@in.ibm.com>
Signed-off-by: HyukjinKwon <gurwls223@apache.org>

examples/src/main/scala/org/apache/spark/examples/sql/hive/SparkHiveExample.scala

@@ -122,16 +122,16 @@ object SparkHiveExample {
     val dataDir = "/tmp/parquet_data"
     spark.range(10).write.parquet(dataDir)
     // Create a Hive external Parquet table
-    sql(s"CREATE EXTERNAL TABLE hive_ints(key int) STORED AS PARQUET LOCATION '$dataDir'")
+    sql(s"CREATE EXTERNAL TABLE hive_bigints(id bigint) STORED AS PARQUET LOCATION '$dataDir'")
     // The Hive external table should already have data
-    sql("SELECT * FROM hive_ints").show()
+    sql("SELECT * FROM hive_bigints").show()
     // +---+
-    // |key|
+    // | id|
     // +---+
     // |  0|
     // |  1|
     // |  2|
-    // ...
+    // ... Order may vary, as spark processes the partitions in parallel.
 
     // Turn on flag for Hive Dynamic Partitioning
     spark.sqlContext.setConf("hive.exec.dynamic.partition", "true")