shorter uuids strings

[ihucos]

They leak into the script include, it would look nicer if they are shorter. Collisions, maintaining counter in redis as state yadda yadda yadda

<script src="https://cdn.counter.dev/script.js" data-id="33671ad4-a966-4a52-b48f-56c92d10a678" data-utcoffset="1"></script>