s/authorized_withdrawer_pubkey/authorized_withdrawer/

(cherry picked from commit f1ba759940)

multinode-demo/validator.sh

@@ -78,7 +78,7 @@ while [[ -n $1 ]]; do
       args+=("$1" "$2")
       shift 2
     elif [[ $1 = --authorized-withdrawer ]]; then
-      authorized_withdrawer_pubkey=$2
+      authorized_withdrawer=$2
       shift 2
     elif [[ $1 = --vote-account ]]; then
       vote_account=$2