[MINOR][DOC] Fix comment error of HiveUtils

## What changes were proposed in this pull request?
Change the version number in comment of `HiveUtils.newClientForExecution` from `13` to `1.2.1` .

## How was this patch tested?

N/A

Closes apache#22850 from laskfla/HiveUtils-Comment.

Authored-by: laskfla <[email protected]>
Signed-off-by: Sean Owen <[email protected]>

Author: laskfla

sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveUtils.scala

@@ -252,7 +252,7 @@ private[spark] object HiveUtils extends Logging {
   /**
    * Create a [[HiveClient]] used for execution.
    *
-   * Currently this must always be Hive 13 as this is the version of Hive that is packaged
+   * Currently this must always be Hive 1.2.1 as this is the version of Hive that is packaged
    * with Spark SQL. This copy of the client is used for execution related tasks like
    * registering temporary functions or ensuring that the ThreadLocal SessionState is
    * correctly populated.  This copy of Hive is *not* used for storing persistent metadata,