## What changes were proposed in this pull request?

Fix the flags used to specify the hadoop version

## How was this patch tested?

Manually tested as part of https://github.com/apache/spark/pull/15659

 by having the build succeed.

cc joshrosen

Author: Holden Karau <holden@us.ibm.com>

Closes #15860 from holdenk/minor-fix-release-build-script.

(cherry picked from commit 1386fd28)
Signed-off-by: Josh Rosen <joshrosen@databricks.com>