chore: fix a typo

apps/emqx_dashboard/test/emqx_swagger_response_SUITE.erl

@@ -680,7 +680,7 @@ to_schema(Object) ->
         post => #{responses => #{200 => Object, 201 => Object}}
     }.
 
-rotos() -> [].
+roots() -> [].
 namespace() -> undefined.
 
 fields(good_ref) ->