message: Update: cache behavior.
diff: @@ -41,4 +41,9 @@ module.exports = {
  },
  },
  ],
  + flags: {
  + // @see: https://github.com/gatsbyjs/gatsby/discussions/28331
  + PRESERVE_FILE_DOWNLOAD_CACHE: true,
  + PRESERVE_WEBPACK_CACHE: true,
  + },
  };
  