docs: Update making plugins.md (#567)

Anson Yu

2023-11-04 aac7b7e97d32580f6a9bd974b8a9068e5218ab9c

 quartz.config.ts

@@ -69,6 +69,7 @@
      }),
      Plugin.Assets(),
      Plugin.Static(),
      Plugin.NotFoundPage(),
    ],
  },
}