Update sp-extension-base.yaml

Author: AE49

curations/npm/npmjs/@microsoft/sp-extension-base.yaml

@@ -27,7 +27,7 @@ revisions:
       declared: OTHER
   1.16.0:
     licensed:
-      declared: CC-BY-4.0
+      declared: OTHER
   1.8.2:
     licensed:
       declared: OTHER