usertools: fix typo in SPDX tag of telemetry script

There is a typo in the SPDX tag, which is down as an "SPDK" tag.
One-character change should be all that is needed.

Fixes: d1b94da4a4e0 ("usertools: add client script for telemetry")
Cc: stable@dpdk.org

Reported-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Kevin Traynor <ktraynor@redhat.com>

usertools/dpdk-telemetry-client.py

@@ -1,5 +1,5 @@
 #! /usr/bin/env python
-# SPDK-License-Identifier: BSD-3-Clause
+# SPDX-License-Identifier: BSD-3-Clause
 # Copyright(c) 2018 Intel Corporation
 
 from __future__ import print_function