[KYUUBI #4373] Using SVN_STAGING_REPO instead of SVN_STAGING_REPO in the release script to fix echo message

### _Why are the changes needed?_

The uploading destination is the svn repo location, not the local temp folder.

### _How was this patch tested?_
- [ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible

- [ ] Add screenshots for manual tests if appropriate

- [ ] [Run test](https://kyuubi.readthedocs.io/en/master/develop_tools/testing.html#running-tests) locally before make a pull request

Closes #4373 from pan3793/minor.

Closes #4373

96aa1d4c9 [Cheng Pan] Fix echo messeage in release script

Authored-by: Cheng Pan <chengpan@apache.org>
Signed-off-by: Cheng Pan <chengpan@apache.org>

build/release/release.sh

@@ -85,7 +85,7 @@ upload_svn_staging() {
 
   svn add "${SVN_STAGING_DIR}/${RELEASE_TAG}"
 
-  echo "Uploading release tarballs to ${SVN_STAGING_DIR}/${RELEASE_TAG}"
+  echo "Uploading release tarballs to ${SVN_STAGING_REPO}/${RELEASE_TAG}"
   (
     cd "${SVN_STAGING_DIR}" && \
     svn commit --username "${ASF_USERNAME}" --password "${ASF_PASSWORD}" --message "Apache Kyuubi ${RELEASE_TAG}"