Switch from member-only license to apache

Change-Id: I7661615a85e60c2aaae1d4b317e28448fda061b7
diff --git a/apps/tost-telegraf/templates/prometheusrule.yaml b/apps/tost-telegraf/templates/prometheusrule.yaml
index c4436c2..d2aded3 100644
--- a/apps/tost-telegraf/templates/prometheusrule.yaml
+++ b/apps/tost-telegraf/templates/prometheusrule.yaml
@@ -1,5 +1,5 @@
 # Copyright 2020-present Open Networking Foundation
-# SPDX-License-Identifier: LicenseRef-ONF-Member-Only-1.0
+# SPDX-License-Identifier: Apache-2.0
 
 apiVersion: monitoring.coreos.com/v1
 kind: PrometheusRule