Add a redirect for licensing

As it used to point to references/licensing and that link is broken

docs/administrator-documentation/references/licensing.md

@@ -0,0 +1,9 @@
+---
+id: licensing
+title: Licensing
+slug: /administrator-documentation/references/licensing
+---
+
+import { Redirect } from '@docusaurus/router';
+
+<Redirect to="/administrator-documentation/licensing" />;