fix TypeError: reject.err is not a function

[idebeijer]

When I ran the crawler it failed due to a Type Error. I later found that due to my VPN the remote was resetting my connection after each request resulting in hitting req.on('error', (error), but as in the snippet below it resulted in a Type Error. The simple change in this PR fixes the Type Error.

tailwindui-crawler/index.mjs:108
      reject.err(error)
             ^
TypeError: reject.err is not a function

I replaced the reject.err with a console log to find out myself why it failed, result:

Error: read ECONNRESET
    at TLSWrap.onStreamRead (node:internal/stream_base_commons:217:20) {
  errno: -54,
  code: 'ECONNRESET',
  syscall: 'read'
}

[kiliman]

Thanks for the PR!