Update license information

UEidentityAPI.json

@@ -5,8 +5,8 @@
     "version": "1.1.1",
     "description": "The ETSI MEC ISG MEC014 UE Identity API described using OpenAPI",
     "license": {
-      "name": "ETSI Forge copyright notice",
-      "url": "https://forge.etsi.org/etsi-forge-copyright-notice.txt"
+      "name": "BSD-3-Clause",
+      "url": "https://forge.etsi.org/legal-matters"
     },
     "contact": {
       "email": "cti_support@etsi.org"

UEidentityAPI.yaml

@@ -4,8 +4,8 @@ info:
   version: 1.1.1
   description: The ETSI MEC ISG MEC014 UE Identity API described using OpenAPI
   license:
-    name: ETSI Forge copyright notice
-    url: https://forge.etsi.org/etsi-forge-copyright-notice.txt
+    name: BSD-3-Clause
+    url: https://forge.etsi.org/legal-matters
   contact:
     email: cti_support@etsi.org
 externalDocs: