[MINOR][BUILD] Fix script name in release-tag usage message

Author: dongjoon-hyun

dev/create-release/release-tag.sh

@@ -21,8 +21,9 @@ SELF=$(cd $(dirname $0) && pwd)
 . "$SELF/release-util.sh"
 
 function exit_with_usage {
+  local NAME=$(basename $0)
   cat << EOF
-usage: tag-release.sh
+usage: $NAME
 Tags a Spark release on a particular branch.
 
 Inputs are specified with the following environment variables: