adding whitelist params

Signed-off-by: man13 <man13@inf.ufpr.br>

app/controllers/management/mime_types_controller.rb

@@ -64,6 +64,6 @@ class Management::MimeTypesController < ManagementController
 
     # Never trust parameters from the scary internet, only allow the white list through.
     def mime_type_params
-      params.fetch(:management_mime_type, {})
+      params.require(:mime_type).permit(:extension, :mime_type)
     end
 end