Switch from member-only license to apache

Change-Id: I7661615a85e60c2aaae1d4b317e28448fda061b7
diff --git a/monitoring/grafana-aether/requirements.yaml b/monitoring/grafana-aether/requirements.yaml
index 297a8f7..435e5e7 100644
--- a/monitoring/grafana-aether/requirements.yaml
+++ b/monitoring/grafana-aether/requirements.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
 
 dependencies:
   - name: grafana