Add CC-BY-SA-4.0 to the approved list

Change-Id: I302aa91595888f040b0f875da87c719e260ede77
diff --git a/licenses.json b/licenses.json
index 38faeeb..295655b 100644
--- a/licenses.json
+++ b/licenses.json
@@ -12,6 +12,7 @@
 		"CC-By-3.0": "Creative Commons Attribution 3.0 Unported",
 		"CC-By-4.0": "Creative Commons Attribution 4.0 International",
 		"CC-By-SA-3.0": "Creative Commons Attribution Share Alike 3.0 Unported",
+		"CC-BY-SA-4.0": "Creative Commons Attribution Share Alike 4.0 International",
 		"CC0-1.0": "Creative Commons Zero V1.0 Universal",
 		"CDDL-1.0": "Common Development and Distribution License (CDDL) Version 1.0",
 		"CDDL-1.1": "Common Development and Distribution License (CDDL) Version 1.1",