message: fixes script reference
  Fixed bug described on
diff: </main>
  - <script src="./index.min.js"></script>
  - <!-- <script type="text/javascript" src="https://unpkg.com/@zxing/library@latest"></script> -->
  + <script type="text/javascript" src="https://unpkg.com/@zxing/library@latest"></script>
  <script type="text/javascript">
  function decodeOnce(codeReader, selectedDeviceId) {
  codeReader.decodeFromInputVideoDevice(selectedDeviceId, 'video').then((result) => {
  