Apps Script trigger - check dane.gov.pl/source-code and send email if new version

Kod.gs

function checkDaneGovPlSourceCode() {
  const scrappedTextFromWebsite = UrlFetchApp.fetch('https://dane.gov.pl/source-code/').getContentText();
  if (scrappedTextFromWebsite.includes(formatDate(new Date()))) {
    MailApp.sendEmail({
      to: "my@e-mail.com",
      subject: "Nowa wersja kodu dane.gov.pl!",
      htmlBody: scrappedTextFromWebsite + "</ br> https://dane.gov.pl/source-code/"
    });
    Logger.log('E-mail was sent.');
  } else {
    Logger.log('E-mail was not sent.');
  }
}

function formatDate(value) {
  let date = new Date(value);
  const day = date.toLocaleString('en-US', { day: '2-digit' });
  const month = date.toLocaleString('en-US', { month: 'short' });
  const year = date.toLocaleString('en-US', { year: 'numeric' });
  let dateToCheck = day + '-' + month + '-' + year;
  Logger.log('dateToCheck = ' + dateToCheck);
  return dateToCheck;
}

Send email as you -> https://www.googleapis.com/auth/script.send_mail
Connect to an external service -> https://www.googleapis.com/auth/script.external_request