add cancan for authorization

app/controllers/templates_restore_controller.rb

@@ -1,11 +1,11 @@
 # frozen_string_literal: true
 
 class TemplatesRestoreController < ApplicationController
+  load_and_authorize_resource :template
+
   def create
-    template = current_account.templates.find(params[:template_id])
+    @template.update!(deleted_at: nil)
 
-    template.update!(deleted_at: nil)
-
-    redirect_to template_path(template), notice: 'Template has been unarchived'
+    redirect_to template_path(@template), notice: 'Template has been unarchived'
   end
 end