Fix broken note box (#183)

Author: davwheat

docs/extend/admin.md

@@ -29,7 +29,7 @@ app.initializers.add('interstellar', function(app) {
 
 Once that is done, you can begin adding settings and permissions. 
 
-::: Note
+:::tip Note
 All registration functions on `ExtensionData` are chainable, meaning you can call them one after another without running `for` again.
 :::