message: Update: gatsby flags.
diff: @@ -41,9 +41,8 @@ module.exports = {
  },
  },
  ],
  + // @see: https://www.gatsbyjs.com/docs/reference/config-files/gatsby-config/#flags
  flags: {
  - // @see: https://github.com/gatsbyjs/gatsby/discussions/28331
  - PRESERVE_FILE_DOWNLOAD_CACHE: true,
  - PRESERVE_WEBPACK_CACHE: true,
  + FAST_DEV: true,
  },
  };
  